/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 --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -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-atomic/dekker.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 14:23:18,411 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 14:23:18,499 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 14:23:18,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 14:23:18,505 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 14:23:18,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 14:23:18,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 14:23:18,539 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 14:23:18,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 14:23:18,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 14:23:18,547 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 14:23:18,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 14:23:18,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 14:23:18,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 14:23:18,550 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 14:23:18,550 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 14:23:18,550 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 14:23:18,550 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 14:23:18,550 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 14:23:18,551 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 14:23:18,551 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 14:23:18,552 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 14:23:18,552 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 14:23:18,553 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 14:23:18,553 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 14:23:18,553 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 14:23:18,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 14:23:18,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:23:18,554 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 14:23:18,554 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 14:23:18,555 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 14:23:18,555 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 14:23:18,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 14:23:18,555 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 14:23:18,555 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 14:23:18,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 14:23:18,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 14:23:18,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 14:23:18,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 14:23:18,872 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 14:23:18,873 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 14:23:18,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/dekker.i [2023-08-26 14:23:20,081 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 14:23:20,394 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 14:23:20,395 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/dekker.i [2023-08-26 14:23:20,409 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d7a8c4cb/2dc79b1fca5b480a95312a96c3124b85/FLAG8b15880a4 [2023-08-26 14:23:20,421 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d7a8c4cb/2dc79b1fca5b480a95312a96c3124b85 [2023-08-26 14:23:20,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 14:23:20,424 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 14:23:20,431 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 14:23:20,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 14:23:20,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 14:23:20,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:20,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b55d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20, skipping insertion in model container [2023-08-26 14:23:20,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:20,493 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 14:23:20,671 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 14:23:20,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:23:20,823 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 14:23:20,848 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 14:23:20,854 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 14:23:20,856 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 14:23:20,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:23:20,922 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 14:23:20,922 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 14:23:20,922 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 14:23:20,928 INFO L206 MainTranslator]: Completed translation [2023-08-26 14:23:20,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20 WrapperNode [2023-08-26 14:23:20,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 14:23:20,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 14:23:20,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 14:23:20,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 14:23:20,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:20,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:20,980 INFO L138 Inliner]: procedures = 172, calls = 62, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 147 [2023-08-26 14:23:20,981 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 14:23:20,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 14:23:20,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 14:23:20,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 14:23:20,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:20,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:20,992 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:20,992 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:20,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:21,000 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:21,001 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:21,002 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:21,004 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 14:23:21,005 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 14:23:21,005 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 14:23:21,005 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 14:23:21,006 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (1/1) ... [2023-08-26 14:23:21,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:23:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:23:21,034 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 14:23:21,059 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 14:23:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 14:23:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-26 14:23:21,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-26 14:23:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 14:23:21,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 14:23:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 14:23:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 14:23:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 14:23:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 14:23:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 14:23:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 14:23:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 14:23:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 14:23:21,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 14:23:21,072 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 14:23:21,179 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 14:23:21,181 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 14:23:21,435 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 14:23:21,441 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 14:23:21,441 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-26 14:23:21,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:23:21 BoogieIcfgContainer [2023-08-26 14:23:21,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 14:23:21,446 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 14:23:21,446 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 14:23:21,448 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 14:23:21,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:23:20" (1/3) ... [2023-08-26 14:23:21,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b3cf40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:23:21, skipping insertion in model container [2023-08-26 14:23:21,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:23:20" (2/3) ... [2023-08-26 14:23:21,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b3cf40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:23:21, skipping insertion in model container [2023-08-26 14:23:21,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:23:21" (3/3) ... [2023-08-26 14:23:21,457 INFO L112 eAbstractionObserver]: Analyzing ICFG dekker.i [2023-08-26 14:23:21,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 14:23:21,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 14:23:21,481 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 14:23:21,572 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 14:23:21,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 120 transitions, 256 flow [2023-08-26 14:23:21,672 INFO L124 PetriNetUnfolderBase]: 15/118 cut-off events. [2023-08-26 14:23:21,672 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 14:23:21,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 15/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 249 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2023-08-26 14:23:21,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 120 transitions, 256 flow [2023-08-26 14:23:21,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 109 transitions, 227 flow [2023-08-26 14:23:21,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 14:23:21,698 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 109 transitions, 227 flow [2023-08-26 14:23:21,700 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 109 transitions, 227 flow [2023-08-26 14:23:21,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 109 transitions, 227 flow [2023-08-26 14:23:21,722 INFO L124 PetriNetUnfolderBase]: 15/109 cut-off events. [2023-08-26 14:23:21,722 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:23:21,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 109 events. 15/109 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 247 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2023-08-26 14:23:21,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 3520 [2023-08-26 14:23:24,098 INFO L134 LiptonReduction]: Checked pairs total: 11402 [2023-08-26 14:23:24,099 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-26 14:23:24,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 14:23:24,113 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;@63006300, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 14:23:24,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-26 14:23:24,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 14:23:24,115 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 14:23:24,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:23:24,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:24,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 14:23:24,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:24,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash 500, now seen corresponding path program 1 times [2023-08-26 14:23:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:24,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514022294] [2023-08-26 14:23:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:24,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:24,214 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 14:23:24,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:24,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514022294] [2023-08-26 14:23:24,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514022294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:24,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:24,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 14:23:24,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858045200] [2023-08-26 14:23:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:24,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 14:23:24,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:24,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 14:23:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 14:23:24,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 216 [2023-08-26 14:23:24,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 115 flow. Second operand has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 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 14:23:24,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:24,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 216 [2023-08-26 14:23:24,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:24,405 INFO L124 PetriNetUnfolderBase]: 917/1464 cut-off events. [2023-08-26 14:23:24,405 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 14:23:24,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2873 conditions, 1464 events. 917/1464 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7629 event pairs, 622 based on Foata normal form. 88/863 useless extension candidates. Maximal degree in co-relation 2647. Up to 1376 conditions per place. [2023-08-26 14:23:24,418 INFO L140 encePairwiseOnDemand]: 210/216 looper letters, 34 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-26 14:23:24,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 167 flow [2023-08-26 14:23:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 14:23:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 14:23:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 254 transitions. [2023-08-26 14:23:24,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879629629629629 [2023-08-26 14:23:24,430 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 254 transitions. [2023-08-26 14:23:24,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 254 transitions. [2023-08-26 14:23:24,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:24,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 254 transitions. [2023-08-26 14:23:24,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.0) internal successors, (254), 2 states have internal predecessors, (254), 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 14:23:24,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 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 14:23:24,440 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 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 14:23:24,442 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 115 flow. Second operand 2 states and 254 transitions. [2023-08-26 14:23:24,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 167 flow [2023-08-26 14:23:24,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 14:23:24,446 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-26 14:23:24,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-26 14:23:24,450 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-26 14:23:24,450 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-26 14:23:24,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 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 14:23:24,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:24,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:23:24,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 14:23:24,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:24,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 490533, now seen corresponding path program 1 times [2023-08-26 14:23:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:24,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423038354] [2023-08-26 14:23:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:24,618 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 14:23:24,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423038354] [2023-08-26 14:23:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423038354] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:24,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:23:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743645619] [2023-08-26 14:23:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:24,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:23:24,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:23:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:23:24,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 216 [2023-08-26 14:23:24,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 14:23:24,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:24,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 216 [2023-08-26 14:23:24,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:24,733 INFO L124 PetriNetUnfolderBase]: 892/1418 cut-off events. [2023-08-26 14:23:24,733 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 14:23:24,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2770 conditions, 1418 events. 892/1418 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7325 event pairs, 604 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 2767. Up to 1330 conditions per place. [2023-08-26 14:23:24,742 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 31 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-26 14:23:24,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 154 flow [2023-08-26 14:23:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:23:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:23:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-26 14:23:24,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2023-08-26 14:23:24,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-26 14:23:24,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-26 14:23:24,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:24,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-26 14:23:24,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 14:23:24,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:24,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:24,749 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 304 transitions. [2023-08-26 14:23:24,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 154 flow [2023-08-26 14:23:24,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 14:23:24,751 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 92 flow [2023-08-26 14:23:24,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-26 14:23:24,752 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-26 14:23:24,752 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 92 flow [2023-08-26 14:23:24,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 14:23:24,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:24,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:23:24,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 14:23:24,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:24,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash 490532, now seen corresponding path program 1 times [2023-08-26 14:23:24,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:24,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648930080] [2023-08-26 14:23:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:24,800 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 14:23:24,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648930080] [2023-08-26 14:23:24,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648930080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:24,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:24,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:23:24,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086805079] [2023-08-26 14:23:24,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:24,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:23:24,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:24,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:23:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:23:24,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 216 [2023-08-26 14:23:24,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 14:23:24,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:24,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 216 [2023-08-26 14:23:24,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:24,910 INFO L124 PetriNetUnfolderBase]: 867/1372 cut-off events. [2023-08-26 14:23:24,910 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 14:23:24,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 1372 events. 867/1372 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7077 event pairs, 586 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 2677. Up to 1285 conditions per place. [2023-08-26 14:23:24,919 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 29 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 14:23:24,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 148 flow [2023-08-26 14:23:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:23:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:23:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-26 14:23:24,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2023-08-26 14:23:24,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-26 14:23:24,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-26 14:23:24,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:24,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-26 14:23:24,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:23:24,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:24,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:24,924 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 92 flow. Second operand 3 states and 296 transitions. [2023-08-26 14:23:24,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 148 flow [2023-08-26 14:23:24,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:23:24,926 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 89 flow [2023-08-26 14:23:24,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-08-26 14:23:24,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2023-08-26 14:23:24,927 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 89 flow [2023-08-26 14:23:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 14:23:24,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:24,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:23:24,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 14:23:24,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:24,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 471412172, now seen corresponding path program 1 times [2023-08-26 14:23:24,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:24,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648555557] [2023-08-26 14:23:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:25,003 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 14:23:25,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:25,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648555557] [2023-08-26 14:23:25,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648555557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:25,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:23:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355229605] [2023-08-26 14:23:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:23:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:23:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:23:25,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 216 [2023-08-26 14:23:25,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 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 14:23:25,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:25,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 216 [2023-08-26 14:23:25,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:25,143 INFO L124 PetriNetUnfolderBase]: 637/1032 cut-off events. [2023-08-26 14:23:25,143 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 14:23:25,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 1032 events. 637/1032 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5135 event pairs, 424 based on Foata normal form. 0/608 useless extension candidates. Maximal degree in co-relation 2012. Up to 959 conditions per place. [2023-08-26 14:23:25,150 INFO L140 encePairwiseOnDemand]: 214/216 looper letters, 28 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 14:23:25,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 145 flow [2023-08-26 14:23:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:23:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:23:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-26 14:23:25,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398148148148148 [2023-08-26 14:23:25,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-26 14:23:25,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-26 14:23:25,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:25,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-26 14:23:25,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 14:23:25,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:25,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:25,155 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 89 flow. Second operand 3 states and 285 transitions. [2023-08-26 14:23:25,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 145 flow [2023-08-26 14:23:25,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:23:25,156 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 88 flow [2023-08-26 14:23:25,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-26 14:23:25,158 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2023-08-26 14:23:25,158 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 88 flow [2023-08-26 14:23:25,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 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 14:23:25,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:25,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:23:25,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 14:23:25,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:25,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:25,160 INFO L85 PathProgramCache]: Analyzing trace with hash 471412173, now seen corresponding path program 1 times [2023-08-26 14:23:25,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:25,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624696780] [2023-08-26 14:23:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:25,228 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 14:23:25,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:25,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624696780] [2023-08-26 14:23:25,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624696780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:25,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:25,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:23:25,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415165716] [2023-08-26 14:23:25,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:25,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:23:25,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:25,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:23:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:23:25,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 216 [2023-08-26 14:23:25,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 14:23:25,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:25,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 216 [2023-08-26 14:23:25,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:25,308 INFO L124 PetriNetUnfolderBase]: 407/692 cut-off events. [2023-08-26 14:23:25,308 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 14:23:25,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 692 events. 407/692 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3275 event pairs, 262 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 1347. Up to 633 conditions per place. [2023-08-26 14:23:25,312 INFO L140 encePairwiseOnDemand]: 214/216 looper letters, 27 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 14:23:25,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 142 flow [2023-08-26 14:23:25,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:23:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:23:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-26 14:23:25,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46141975308641975 [2023-08-26 14:23:25,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-26 14:23:25,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-26 14:23:25,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:25,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-26 14:23:25,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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 14:23:25,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:25,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:25,316 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 88 flow. Second operand 3 states and 299 transitions. [2023-08-26 14:23:25,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 142 flow [2023-08-26 14:23:25,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:23:25,318 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 87 flow [2023-08-26 14:23:25,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-26 14:23:25,319 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2023-08-26 14:23:25,320 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 87 flow [2023-08-26 14:23:25,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 14:23:25,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:25,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 14:23:25,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 14:23:25,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:25,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:25,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1727594318, now seen corresponding path program 1 times [2023-08-26 14:23:25,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:25,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393809052] [2023-08-26 14:23:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:25,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:25,345 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 14:23:25,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:25,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393809052] [2023-08-26 14:23:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393809052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:25,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:25,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:23:25,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282413253] [2023-08-26 14:23:25,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:25,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:23:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:23:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:23:25,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2023-08-26 14:23:25,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 14:23:25,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:25,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2023-08-26 14:23:25,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:25,435 INFO L124 PetriNetUnfolderBase]: 473/848 cut-off events. [2023-08-26 14:23:25,435 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 14:23:25,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 848 events. 473/848 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4311 event pairs, 176 based on Foata normal form. 0/595 useless extension candidates. Maximal degree in co-relation 1631. Up to 448 conditions per place. [2023-08-26 14:23:25,439 INFO L140 encePairwiseOnDemand]: 210/216 looper letters, 40 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2023-08-26 14:23:25,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 208 flow [2023-08-26 14:23:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:23:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:23:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-26 14:23:25,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2023-08-26 14:23:25,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-26 14:23:25,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-26 14:23:25,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:25,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-26 14:23:25,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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 14:23:25,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:25,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:25,444 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 87 flow. Second operand 3 states and 348 transitions. [2023-08-26 14:23:25,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 208 flow [2023-08-26 14:23:25,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:23:25,446 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 108 flow [2023-08-26 14:23:25,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-26 14:23:25,446 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2023-08-26 14:23:25,447 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 108 flow [2023-08-26 14:23:25,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 14:23:25,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:25,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:23:25,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 14:23:25,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr2Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:25,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:25,448 INFO L85 PathProgramCache]: Analyzing trace with hash -703985391, now seen corresponding path program 1 times [2023-08-26 14:23:25,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:25,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91318982] [2023-08-26 14:23:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:25,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:25,475 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 14:23:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:25,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91318982] [2023-08-26 14:23:25,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91318982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:25,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:25,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:23:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212723599] [2023-08-26 14:23:25,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:25,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:23:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:23:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:23:25,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2023-08-26 14:23:25,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 14:23:25,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:25,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2023-08-26 14:23:25,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:25,567 INFO L124 PetriNetUnfolderBase]: 389/712 cut-off events. [2023-08-26 14:23:25,568 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 14:23:25,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 712 events. 389/712 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3562 event pairs, 176 based on Foata normal form. 30/611 useless extension candidates. Maximal degree in co-relation 1492. Up to 445 conditions per place. [2023-08-26 14:23:25,571 INFO L140 encePairwiseOnDemand]: 211/216 looper letters, 34 selfloop transitions, 2 changer transitions 6/51 dead transitions. [2023-08-26 14:23:25,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 215 flow [2023-08-26 14:23:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:23:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:23:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-26 14:23:25,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2023-08-26 14:23:25,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-26 14:23:25,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-26 14:23:25,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:25,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-26 14:23:25,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 14:23:25,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:25,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 14:23:25,576 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 108 flow. Second operand 3 states and 345 transitions. [2023-08-26 14:23:25,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 215 flow [2023-08-26 14:23:25,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:23:25,579 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 106 flow [2023-08-26 14:23:25,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-08-26 14:23:25,580 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-26 14:23:25,580 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 106 flow [2023-08-26 14:23:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 14:23:25,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:25,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:23:25,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 14:23:25,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:25,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash -35343086, now seen corresponding path program 1 times [2023-08-26 14:23:25,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:25,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445001470] [2023-08-26 14:23:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:25,618 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 14:23:25,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:25,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445001470] [2023-08-26 14:23:25,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445001470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:25,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:25,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 14:23:25,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146536410] [2023-08-26 14:23:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:25,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:23:25,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:23:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:23:25,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2023-08-26 14:23:25,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 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 14:23:25,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:25,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2023-08-26 14:23:25,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:25,755 INFO L124 PetriNetUnfolderBase]: 501/902 cut-off events. [2023-08-26 14:23:25,755 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2023-08-26 14:23:25,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 902 events. 501/902 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4689 event pairs, 111 based on Foata normal form. 14/746 useless extension candidates. Maximal degree in co-relation 1803. Up to 278 conditions per place. [2023-08-26 14:23:25,759 INFO L140 encePairwiseOnDemand]: 208/216 looper letters, 50 selfloop transitions, 11 changer transitions 4/75 dead transitions. [2023-08-26 14:23:25,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 322 flow [2023-08-26 14:23:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 14:23:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 14:23:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 556 transitions. [2023-08-26 14:23:25,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2023-08-26 14:23:25,761 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 556 transitions. [2023-08-26 14:23:25,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 556 transitions. [2023-08-26 14:23:25,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:25,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 556 transitions. [2023-08-26 14:23:25,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 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 14:23:25,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 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 14:23:25,765 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 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 14:23:25,765 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 106 flow. Second operand 5 states and 556 transitions. [2023-08-26 14:23:25,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 322 flow [2023-08-26 14:23:25,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:23:25,768 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 170 flow [2023-08-26 14:23:25,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-26 14:23:25,768 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-26 14:23:25,768 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 170 flow [2023-08-26 14:23:25,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 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 14:23:25,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:23:25,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:23:25,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 14:23:25,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 14:23:25,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:23:25,770 INFO L85 PathProgramCache]: Analyzing trace with hash -120483564, now seen corresponding path program 2 times [2023-08-26 14:23:25,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:23:25,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979273691] [2023-08-26 14:23:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:23:25,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:23:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:23:25,804 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 14:23:25,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:23:25,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979273691] [2023-08-26 14:23:25,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979273691] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:23:25,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:23:25,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 14:23:25,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070986655] [2023-08-26 14:23:25,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:23:25,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:23:25,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:25,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:23:25,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:23:25,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2023-08-26 14:23:25,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 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 14:23:25,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:25,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2023-08-26 14:23:25,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:25,978 INFO L124 PetriNetUnfolderBase]: 824/1345 cut-off events. [2023-08-26 14:23:25,978 INFO L125 PetriNetUnfolderBase]: For 891/901 co-relation queries the response was YES. [2023-08-26 14:23:25,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 1345 events. 824/1345 cut-off events. For 891/901 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6465 event pairs, 156 based on Foata normal form. 36/1220 useless extension candidates. Maximal degree in co-relation 3251. Up to 401 conditions per place. [2023-08-26 14:23:25,981 INFO L140 encePairwiseOnDemand]: 209/216 looper letters, 0 selfloop transitions, 0 changer transitions 89/89 dead transitions. [2023-08-26 14:23:25,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 89 transitions, 495 flow [2023-08-26 14:23:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 14:23:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 14:23:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-08-26 14:23:25,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-26 14:23:25,983 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-08-26 14:23:25,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-08-26 14:23:25,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:23:25,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-08-26 14:23:25,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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 14:23:25,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 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 14:23:25,987 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 states have internal predecessors, (1296), 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 14:23:25,987 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 170 flow. Second operand 5 states and 555 transitions. [2023-08-26 14:23:25,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 89 transitions, 495 flow [2023-08-26 14:23:25,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 89 transitions, 491 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-26 14:23:25,991 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2023-08-26 14:23:25,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2023-08-26 14:23:25,992 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-26 14:23:25,992 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2023-08-26 14:23:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 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 14:23:25,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (13 of 14 remaining) [2023-08-26 14:23:25,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (12 of 14 remaining) [2023-08-26 14:23:25,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2023-08-26 14:23:25,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-08-26 14:23:25,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2023-08-26 14:23:25,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2023-08-26 14:23:25,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2023-08-26 14:23:25,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2023-08-26 14:23:25,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2023-08-26 14:23:25,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2023-08-26 14:23:25,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 14 remaining) [2023-08-26 14:23:25,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2023-08-26 14:23:25,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (1 of 14 remaining) [2023-08-26 14:23:25,997 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 14 remaining) [2023-08-26 14:23:25,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 14:23:25,997 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:23:26,001 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 14:23:26,001 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 14:23:26,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:23:26 BasicIcfg [2023-08-26 14:23:26,004 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 14:23:26,004 INFO L158 Benchmark]: Toolchain (without parser) took 5580.03ms. Allocated memory was 333.4MB in the beginning and 400.6MB in the end (delta: 67.1MB). Free memory was 307.2MB in the beginning and 362.8MB in the end (delta: -55.6MB). Peak memory consumption was 236.2MB. Max. memory is 16.0GB. [2023-08-26 14:23:26,004 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 333.4MB. Free memory was 310.0MB in the beginning and 309.9MB in the end (delta: 122.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:23:26,005 INFO L158 Benchmark]: CACSL2BoogieTranslator took 497.73ms. Allocated memory is still 333.4MB. Free memory was 307.2MB in the beginning and 286.9MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 14:23:26,005 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.21ms. Allocated memory is still 333.4MB. Free memory was 286.9MB in the beginning and 285.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:23:26,005 INFO L158 Benchmark]: Boogie Preprocessor took 23.29ms. Allocated memory is still 333.4MB. Free memory was 285.0MB in the beginning and 283.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 14:23:26,005 INFO L158 Benchmark]: RCFGBuilder took 438.43ms. Allocated memory is still 333.4MB. Free memory was 283.4MB in the beginning and 267.6MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 14:23:26,006 INFO L158 Benchmark]: TraceAbstraction took 4558.18ms. Allocated memory was 333.4MB in the beginning and 400.6MB in the end (delta: 67.1MB). Free memory was 267.0MB in the beginning and 362.8MB in the end (delta: -95.8MB). Peak memory consumption was 196.4MB. Max. memory is 16.0GB. [2023-08-26 14:23:26,007 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 333.4MB. Free memory was 310.0MB in the beginning and 309.9MB in the end (delta: 122.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 497.73ms. Allocated memory is still 333.4MB. Free memory was 307.2MB in the beginning and 286.9MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.21ms. Allocated memory is still 333.4MB. Free memory was 286.9MB in the beginning and 285.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.29ms. Allocated memory is still 333.4MB. Free memory was 285.0MB in the beginning and 283.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 438.43ms. Allocated memory is still 333.4MB. Free memory was 283.4MB in the beginning and 267.6MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 4558.18ms. Allocated memory was 333.4MB in the beginning and 400.6MB in the end (delta: 67.1MB). Free memory was 267.0MB in the beginning and 362.8MB in the end (delta: -95.8MB). Peak memory consumption was 196.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 101 PlacesBefore, 50 PlacesAfterwards, 109 TransitionsBefore, 53 TransitionsAfterwards, 3520 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 17 ConcurrentYvCompositions, 5 ChoiceCompositions, 96 TotalNumberOfCompositions, 11402 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5283, independent: 4960, independent conditional: 0, independent unconditional: 4960, dependent: 323, dependent conditional: 0, dependent unconditional: 323, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1930, independent: 1879, independent conditional: 0, independent unconditional: 1879, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5283, independent: 3081, independent conditional: 0, independent unconditional: 3081, dependent: 272, dependent conditional: 0, dependent unconditional: 272, unknown: 1930, unknown conditional: 0, unknown unconditional: 1930] , Statistics on independence cache: Total cache size (in pairs): 322, Positive cache size: 288, Positive conditional cache size: 0, Positive unconditional cache size: 288, Negative cache size: 34, Negative conditional cache size: 0, Negative unconditional cache size: 34, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 160 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.4s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 241 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 241 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 519 IncrementalHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 7 mSDtfsCounter, 519 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=8, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 166 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 14:23:26,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...