/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 PROGRAM_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/weaver/test-semi1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:21:44,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:21:44,435 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 20:21:44,440 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:21:44,440 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:21:44,471 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:21:44,471 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:21:44,472 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:21:44,472 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:21:44,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:21:44,476 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:21:44,476 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:21:44,476 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:21:44,478 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:21:44,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:21:44,478 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:21:44,478 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:21:44,478 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:21:44,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:21:44,479 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:21:44,479 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:21:44,480 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:21:44,480 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:21:44,480 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:21:44,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:21:44,481 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:21:44,481 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:21:44,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:21:44,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:21:44,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:21:44,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:21:44,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:21:44,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:21:44,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:21:44,483 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:21:44,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:21:44,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:21:44,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:21:44,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:21:44,819 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:21:44,819 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:21:44,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-semi1.wvr.c [2023-08-26 20:21:45,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:21:46,124 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:21:46,125 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-semi1.wvr.c [2023-08-26 20:21:46,134 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56ec9fa64/7c742a5283304f0c86b2f6b7a1e69b1f/FLAGcdb4b2f01 [2023-08-26 20:21:46,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56ec9fa64/7c742a5283304f0c86b2f6b7a1e69b1f [2023-08-26 20:21:46,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:21:46,152 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:21:46,155 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:21:46,155 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:21:46,158 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:21:46,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd50b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46, skipping insertion in model container [2023-08-26 20:21:46,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,181 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:21:46,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:21:46,365 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:21:46,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:21:46,400 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:21:46,400 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:21:46,406 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:21:46,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46 WrapperNode [2023-08-26 20:21:46,406 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:21:46,408 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:21:46,408 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:21:46,408 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:21:46,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,453 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 75 [2023-08-26 20:21:46,453 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:21:46,454 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:21:46,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:21:46,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:21:46,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,480 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:21:46,489 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:21:46,489 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:21:46,489 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:21:46,490 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (1/1) ... [2023-08-26 20:21:46,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:21:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:21:46,522 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 20:21:46,549 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 20:21:46,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:21:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:21:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:21:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:21:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:21:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:21:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:21:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:21:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:21:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:21:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:21:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:21:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:21:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:21:46,567 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 20:21:46,668 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:21:46,669 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:21:46,848 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:21:46,880 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:21:46,880 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 20:21:46,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:21:46 BoogieIcfgContainer [2023-08-26 20:21:46,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:21:46,884 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:21:46,884 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:21:46,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:21:46,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:21:46" (1/3) ... [2023-08-26 20:21:46,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e264d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:21:46, skipping insertion in model container [2023-08-26 20:21:46,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:21:46" (2/3) ... [2023-08-26 20:21:46,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e264d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:21:46, skipping insertion in model container [2023-08-26 20:21:46,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:21:46" (3/3) ... [2023-08-26 20:21:46,898 INFO L112 eAbstractionObserver]: Analyzing ICFG test-semi1.wvr.c [2023-08-26 20:21:46,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:21:46,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 20:21:46,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:21:46,975 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 20:21:47,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 84 transitions, 184 flow [2023-08-26 20:21:47,047 INFO L124 PetriNetUnfolderBase]: 3/82 cut-off events. [2023-08-26 20:21:47,048 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:21:47,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 3/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-26 20:21:47,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 84 transitions, 184 flow [2023-08-26 20:21:47,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 73 transitions, 158 flow [2023-08-26 20:21:47,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:21:47,065 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 73 transitions, 158 flow [2023-08-26 20:21:47,068 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 73 transitions, 158 flow [2023-08-26 20:21:47,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 73 transitions, 158 flow [2023-08-26 20:21:47,087 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-08-26 20:21:47,087 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:21:47,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 3/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-26 20:21:47,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 156 [2023-08-26 20:21:49,675 INFO L134 LiptonReduction]: Checked pairs total: 308 [2023-08-26 20:21:49,679 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-26 20:21:49,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:21:49,699 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;@4c8a5c4a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:21:49,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 20:21:49,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:21:49,700 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 20:21:49,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:21:49,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:49,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:21:49,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:49,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash 324, now seen corresponding path program 1 times [2023-08-26 20:21:49,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:49,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752270527] [2023-08-26 20:21:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:49,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:49,789 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 20:21:49,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:49,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752270527] [2023-08-26 20:21:49,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752270527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:49,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:49,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:21:49,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575291543] [2023-08-26 20:21:49,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:49,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:21:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:21:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:21:49,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 163 [2023-08-26 20:21:49,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 50 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 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 20:21:49,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:49,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 163 [2023-08-26 20:21:49,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:49,867 INFO L124 PetriNetUnfolderBase]: 21/56 cut-off events. [2023-08-26 20:21:49,868 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 20:21:49,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 56 events. 21/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 128 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 84. Up to 57 conditions per place. [2023-08-26 20:21:49,870 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 17 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 20:21:49,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 80 flow [2023-08-26 20:21:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:21:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:21:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 167 transitions. [2023-08-26 20:21:49,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122699386503068 [2023-08-26 20:21:49,886 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 167 transitions. [2023-08-26 20:21:49,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 167 transitions. [2023-08-26 20:21:49,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:49,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 167 transitions. [2023-08-26 20:21:49,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 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 20:21:49,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 20:21:49,900 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 20:21:49,901 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 50 flow. Second operand 2 states and 167 transitions. [2023-08-26 20:21:49,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 80 flow [2023-08-26 20:21:49,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 20:21:49,906 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 38 flow [2023-08-26 20:21:49,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-26 20:21:49,912 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 20:21:49,913 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 38 flow [2023-08-26 20:21:49,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 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 20:21:49,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:49,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:21:49,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:21:49,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:49,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:49,915 INFO L85 PathProgramCache]: Analyzing trace with hash 316225, now seen corresponding path program 1 times [2023-08-26 20:21:49,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:49,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159791532] [2023-08-26 20:21:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:49,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:50,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:50,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159791532] [2023-08-26 20:21:50,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159791532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:50,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:50,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:21:50,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5345322] [2023-08-26 20:21:50,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:21:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:21:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:21:50,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 163 [2023-08-26 20:21:50,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 20:21:50,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:50,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 163 [2023-08-26 20:21:50,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:50,104 INFO L124 PetriNetUnfolderBase]: 19/50 cut-off events. [2023-08-26 20:21:50,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:21:50,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 50 events. 19/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 107 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 103. Up to 50 conditions per place. [2023-08-26 20:21:50,106 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 20:21:50,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 64 flow [2023-08-26 20:21:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:21:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:21:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2023-08-26 20:21:50,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721881390593047 [2023-08-26 20:21:50,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2023-08-26 20:21:50,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2023-08-26 20:21:50,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:50,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2023-08-26 20:21:50,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 20:21:50,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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 20:21:50,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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 20:21:50,119 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 38 flow. Second operand 3 states and 182 transitions. [2023-08-26 20:21:50,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 64 flow [2023-08-26 20:21:50,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:21:50,120 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 36 flow [2023-08-26 20:21:50,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-26 20:21:50,122 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 20:21:50,124 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 36 flow [2023-08-26 20:21:50,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 20:21:50,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:50,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:21:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:21:50,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:50,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 316226, now seen corresponding path program 1 times [2023-08-26 20:21:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:50,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430224150] [2023-08-26 20:21:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:50,259 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 20:21:50,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:50,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430224150] [2023-08-26 20:21:50,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430224150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:50,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:50,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:21:50,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395264463] [2023-08-26 20:21:50,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:50,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:21:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:21:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:21:50,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 163 [2023-08-26 20:21:50,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 20:21:50,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:50,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 163 [2023-08-26 20:21:50,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:50,289 INFO L124 PetriNetUnfolderBase]: 17/44 cut-off events. [2023-08-26 20:21:50,290 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:21:50,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 44 events. 17/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 89 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 92. Up to 44 conditions per place. [2023-08-26 20:21:50,291 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 20:21:50,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 58 flow [2023-08-26 20:21:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:21:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:21:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-08-26 20:21:50,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803680981595092 [2023-08-26 20:21:50,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-08-26 20:21:50,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-08-26 20:21:50,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:50,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-08-26 20:21:50,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 20:21:50,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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 20:21:50,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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 20:21:50,297 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 36 flow. Second operand 3 states and 186 transitions. [2023-08-26 20:21:50,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 58 flow [2023-08-26 20:21:50,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:50,298 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 33 flow [2023-08-26 20:21:50,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=33, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-08-26 20:21:50,299 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 20:21:50,299 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 33 flow [2023-08-26 20:21:50,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 20:21:50,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:50,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:21:50,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:21:50,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:50,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash 303898090, now seen corresponding path program 1 times [2023-08-26 20:21:50,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:50,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7114980] [2023-08-26 20:21:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:50,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:50,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:50,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7114980] [2023-08-26 20:21:50,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7114980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:50,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:50,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:21:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617747152] [2023-08-26 20:21:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:21:50,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:21:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:21:50,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 163 [2023-08-26 20:21:50,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 33 flow. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 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 20:21:50,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:50,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 163 [2023-08-26 20:21:50,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:50,450 INFO L124 PetriNetUnfolderBase]: 13/36 cut-off events. [2023-08-26 20:21:50,450 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:21:50,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 36 events. 13/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 59 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 77. Up to 36 conditions per place. [2023-08-26 20:21:50,451 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 20:21:50,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 55 flow [2023-08-26 20:21:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:21:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:21:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-08-26 20:21:50,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456032719836401 [2023-08-26 20:21:50,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-08-26 20:21:50,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-08-26 20:21:50,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:50,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-08-26 20:21:50,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 20:21:50,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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 20:21:50,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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 20:21:50,456 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 33 flow. Second operand 3 states and 169 transitions. [2023-08-26 20:21:50,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 55 flow [2023-08-26 20:21:50,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:50,457 INFO L231 Difference]: Finished difference. Result has 20 places, 12 transitions, 32 flow [2023-08-26 20:21:50,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=20, PETRI_TRANSITIONS=12} [2023-08-26 20:21:50,459 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 20:21:50,459 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions, 32 flow [2023-08-26 20:21:50,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 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 20:21:50,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:50,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:21:50,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:21:50,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:50,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 303898089, now seen corresponding path program 1 times [2023-08-26 20:21:50,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:50,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127989495] [2023-08-26 20:21:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:50,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:50,615 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 20:21:50,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:50,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127989495] [2023-08-26 20:21:50,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127989495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:50,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:50,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:21:50,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396920929] [2023-08-26 20:21:50,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:50,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:21:50,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:21:50,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:21:50,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 163 [2023-08-26 20:21:50,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 12 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 20:21:50,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:50,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 163 [2023-08-26 20:21:50,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:50,642 INFO L124 PetriNetUnfolderBase]: 9/28 cut-off events. [2023-08-26 20:21:50,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:21:50,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 28 events. 9/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 62. Up to 28 conditions per place. [2023-08-26 20:21:50,648 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 10 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-08-26 20:21:50,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 11 transitions, 52 flow [2023-08-26 20:21:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:21:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:21:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2023-08-26 20:21:50,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496932515337423 [2023-08-26 20:21:50,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 171 transitions. [2023-08-26 20:21:50,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 171 transitions. [2023-08-26 20:21:50,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:50,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 171 transitions. [2023-08-26 20:21:50,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 20:21:50,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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 20:21:50,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 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 20:21:50,654 INFO L175 Difference]: Start difference. First operand has 20 places, 12 transitions, 32 flow. Second operand 3 states and 171 transitions. [2023-08-26 20:21:50,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 11 transitions, 52 flow [2023-08-26 20:21:50,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 11 transitions, 51 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:50,655 INFO L231 Difference]: Finished difference. Result has 20 places, 11 transitions, 31 flow [2023-08-26 20:21:50,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=20, PETRI_TRANSITIONS=11} [2023-08-26 20:21:50,656 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 20:21:50,656 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 31 flow [2023-08-26 20:21:50,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 20:21:50,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:50,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:21:50,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:21:50,657 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:50,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:50,657 INFO L85 PathProgramCache]: Analyzing trace with hash 881097237, now seen corresponding path program 1 times [2023-08-26 20:21:50,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:50,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579834605] [2023-08-26 20:21:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:50,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:50,820 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 20:21:50,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:50,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579834605] [2023-08-26 20:21:50,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579834605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:50,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:50,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:21:50,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537036651] [2023-08-26 20:21:50,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:50,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:21:50,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:21:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:21:50,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 163 [2023-08-26 20:21:50,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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 20:21:50,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:50,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 163 [2023-08-26 20:21:50,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:50,871 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2023-08-26 20:21:50,871 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:21:50,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 32 events. 8/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 58 event pairs, 1 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 71. Up to 13 conditions per place. [2023-08-26 20:21:50,872 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 10 selfloop transitions, 2 changer transitions 10/22 dead transitions. [2023-08-26 20:21:50,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 101 flow [2023-08-26 20:21:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:21:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:21:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-08-26 20:21:50,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44631901840490795 [2023-08-26 20:21:50,874 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-08-26 20:21:50,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-08-26 20:21:50,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:50,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-08-26 20:21:50,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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 20:21:50,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 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 20:21:50,877 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 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 20:21:50,878 INFO L175 Difference]: Start difference. First operand has 20 places, 11 transitions, 31 flow. Second operand 4 states and 291 transitions. [2023-08-26 20:21:50,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 101 flow [2023-08-26 20:21:50,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 22 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:50,879 INFO L231 Difference]: Finished difference. Result has 23 places, 11 transitions, 40 flow [2023-08-26 20:21:50,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=40, PETRI_PLACES=23, PETRI_TRANSITIONS=11} [2023-08-26 20:21:50,881 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-08-26 20:21:50,881 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 11 transitions, 40 flow [2023-08-26 20:21:50,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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 20:21:50,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:50,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:21:50,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:21:50,882 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:50,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1536610611, now seen corresponding path program 2 times [2023-08-26 20:21:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:50,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105502104] [2023-08-26 20:21:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:51,018 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 20:21:51,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:51,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105502104] [2023-08-26 20:21:51,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105502104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:51,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:51,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:21:51,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479435722] [2023-08-26 20:21:51,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:51,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:21:51,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:21:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:21:51,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 163 [2023-08-26 20:21:51,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 11 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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 20:21:51,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:51,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 163 [2023-08-26 20:21:51,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:51,043 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-26 20:21:51,043 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:21:51,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 14 events. 2/14 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 1 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 41. Up to 11 conditions per place. [2023-08-26 20:21:51,043 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-26 20:21:51,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 11 transitions, 60 flow [2023-08-26 20:21:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:21:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:21:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 280 transitions. [2023-08-26 20:21:51,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294478527607362 [2023-08-26 20:21:51,045 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 280 transitions. [2023-08-26 20:21:51,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 280 transitions. [2023-08-26 20:21:51,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:51,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 280 transitions. [2023-08-26 20:21:51,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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 20:21:51,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 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 20:21:51,047 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 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 20:21:51,047 INFO L175 Difference]: Start difference. First operand has 23 places, 11 transitions, 40 flow. Second operand 4 states and 280 transitions. [2023-08-26 20:21:51,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 11 transitions, 60 flow [2023-08-26 20:21:51,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 11 transitions, 54 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 20:21:51,048 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-26 20:21:51,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-26 20:21:51,049 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 20:21:51,049 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-26 20:21:51,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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 20:21:51,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 20:21:51,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 20:21:51,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 20:21:51,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 20:21:51,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 20:21:51,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 20:21:51,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 20:21:51,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 20:21:51,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 20:21:51,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 20:21:51,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 20:21:51,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:21:51,056 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-08-26 20:21:51,060 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:21:51,060 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:21:51,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:21:51 BasicIcfg [2023-08-26 20:21:51,067 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:21:51,068 INFO L158 Benchmark]: Toolchain (without parser) took 4915.84ms. Allocated memory is still 358.6MB. Free memory was 315.8MB in the beginning and 150.8MB in the end (delta: 165.0MB). Peak memory consumption was 166.0MB. Max. memory is 16.0GB. [2023-08-26 20:21:51,068 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 358.6MB. Free memory was 335.4MB in the beginning and 335.3MB in the end (delta: 121.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:21:51,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.66ms. Allocated memory is still 358.6MB. Free memory was 315.8MB in the beginning and 305.3MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2023-08-26 20:21:51,069 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.97ms. Allocated memory is still 358.6MB. Free memory was 304.2MB in the beginning and 303.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:21:51,069 INFO L158 Benchmark]: Boogie Preprocessor took 34.04ms. Allocated memory is still 358.6MB. Free memory was 303.2MB in the beginning and 302.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:21:51,069 INFO L158 Benchmark]: RCFGBuilder took 393.25ms. Allocated memory is still 358.6MB. Free memory was 302.1MB in the beginning and 285.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 20:21:51,069 INFO L158 Benchmark]: TraceAbstraction took 4183.35ms. Allocated memory is still 358.6MB. Free memory was 284.3MB in the beginning and 150.8MB in the end (delta: 133.5MB). Peak memory consumption was 136.7MB. Max. memory is 16.0GB. [2023-08-26 20:21:51,071 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 358.6MB. Free memory was 335.4MB in the beginning and 335.3MB in the end (delta: 121.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 251.66ms. Allocated memory is still 358.6MB. Free memory was 315.8MB in the beginning and 305.3MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 45.97ms. Allocated memory is still 358.6MB. Free memory was 304.2MB in the beginning and 303.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 34.04ms. Allocated memory is still 358.6MB. Free memory was 303.2MB in the beginning and 302.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 393.25ms. Allocated memory is still 358.6MB. Free memory was 302.1MB in the beginning and 285.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 4183.35ms. Allocated memory is still 358.6MB. Free memory was 284.3MB in the beginning and 150.8MB in the end (delta: 133.5MB). Peak memory consumption was 136.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 77 PlacesBefore, 26 PlacesAfterwards, 73 TransitionsBefore, 19 TransitionsAfterwards, 156 CoEnabledTransitionPairs, 7 FixpointIterations, 46 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 0 ConcurrentYvCompositions, 3 ChoiceCompositions, 79 TotalNumberOfCompositions, 308 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 245, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 95, independent: 92, independent conditional: 0, independent unconditional: 92, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 245, independent: 138, independent conditional: 0, independent unconditional: 138, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 95, unknown conditional: 0, unknown unconditional: 95] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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 - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 92 locations, 11 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: 4.0s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 63 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 128 IncrementalHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 0 mSDtfsCounter, 128 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=0, InterpolantAutomatonStates: 22, 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, 0.7s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 256 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 20:21:51,093 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...