/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-atomic/lamport.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:41:54,505 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:41:54,578 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 11:41:54,582 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:41:54,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:41:54,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:41:54,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:41:54,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:41:54,613 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:41:54,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:41:54,617 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:41:54,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:41:54,617 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:41:54,619 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:41:54,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:41:54,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:41:54,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:41:54,620 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:41:54,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:41:54,620 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:41:54,620 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:41:54,621 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:41:54,622 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:41:54,622 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:41:54,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:41:54,623 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:41:54,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:41:54,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:41:54,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:41:54,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:41:54,625 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:41:54,625 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:41:54,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:41:54,625 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:41:54,626 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:41:54,626 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:41:54,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:41:55,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:41:55,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:41:55,006 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:41:55,008 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:41:55,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/lamport.i [2023-08-26 11:41:56,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:41:56,644 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:41:56,645 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/lamport.i [2023-08-26 11:41:56,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de38c0755/51c39969299144f387441fc1f89ed399/FLAGbd43606b7 [2023-08-26 11:41:56,675 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de38c0755/51c39969299144f387441fc1f89ed399 [2023-08-26 11:41:56,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:41:56,687 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:41:56,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:41:56,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:41:56,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:41:56,691 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:41:56" (1/1) ... [2023-08-26 11:41:56,692 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d1c721a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:56, skipping insertion in model container [2023-08-26 11:41:56,692 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:41:56" (1/1) ... [2023-08-26 11:41:56,753 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:41:56,882 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:41:57,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:41:57,052 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:41:57,076 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:41:57,086 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-26 11:41:57,093 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-26 11:41:57,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:41:57,155 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:57,155 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:57,155 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:57,162 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:41:57,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57 WrapperNode [2023-08-26 11:41:57,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:41:57,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:41:57,164 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:41:57,164 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:41:57,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,228 INFO L138 Inliner]: procedures = 171, calls = 85, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 210 [2023-08-26 11:41:57,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:41:57,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:41:57,230 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:41:57,230 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:41:57,238 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,256 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,261 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,267 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,282 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:41:57,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:41:57,283 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:41:57,283 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:41:57,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (1/1) ... [2023-08-26 11:41:57,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:41:57,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:57,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 11:41:57,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 11:41:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:41:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-26 11:41:57,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-26 11:41:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:41:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:41:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:41:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 11:41:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:41:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:41:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:41:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:41:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 11:41:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:41:57,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:41:57,361 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 11:41:57,521 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:41:57,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:41:57,721 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:41:57,728 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:41:57,728 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-26 11:41:57,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:41:57 BoogieIcfgContainer [2023-08-26 11:41:57,731 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:41:57,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:41:57,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:41:57,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:41:57,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:41:56" (1/3) ... [2023-08-26 11:41:57,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ef3039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:41:57, skipping insertion in model container [2023-08-26 11:41:57,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:57" (2/3) ... [2023-08-26 11:41:57,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ef3039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:41:57, skipping insertion in model container [2023-08-26 11:41:57,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:41:57" (3/3) ... [2023-08-26 11:41:57,738 INFO L112 eAbstractionObserver]: Analyzing ICFG lamport.i [2023-08-26 11:41:57,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:41:57,755 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 11:41:57,755 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:41:57,827 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 11:41:57,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 149 transitions, 314 flow [2023-08-26 11:41:57,912 INFO L124 PetriNetUnfolderBase]: 26/147 cut-off events. [2023-08-26 11:41:57,912 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:41:57,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 147 events. 26/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 358 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 113. Up to 5 conditions per place. [2023-08-26 11:41:57,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 149 transitions, 314 flow [2023-08-26 11:41:57,928 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 138 transitions, 285 flow [2023-08-26 11:41:57,932 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:41:57,943 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 138 transitions, 285 flow [2023-08-26 11:41:57,947 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 138 transitions, 285 flow [2023-08-26 11:41:57,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 138 transitions, 285 flow [2023-08-26 11:41:57,979 INFO L124 PetriNetUnfolderBase]: 26/138 cut-off events. [2023-08-26 11:41:57,979 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:41:57,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 138 events. 26/138 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 357 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 113. Up to 5 conditions per place. [2023-08-26 11:41:57,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 7056 [2023-08-26 11:42:00,096 INFO L134 LiptonReduction]: Checked pairs total: 18504 [2023-08-26 11:42:00,097 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-26 11:42:00,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:42:00,114 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;@78bf2c5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:42:00,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-26 11:42:00,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:42:00,115 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:42:00,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:42:00,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:00,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:42:00,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:00,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash 639, now seen corresponding path program 1 times [2023-08-26 11:42:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:00,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105256654] [2023-08-26 11:42:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:00,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:00,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105256654] [2023-08-26 11:42:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105256654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:00,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:00,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:42:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754427741] [2023-08-26 11:42:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:42:00,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:42:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:42:00,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 252 [2023-08-26 11:42:00,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 159 flow. Second operand has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:00,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:00,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 252 [2023-08-26 11:42:00,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:00,571 INFO L124 PetriNetUnfolderBase]: 1998/3179 cut-off events. [2023-08-26 11:42:00,571 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-26 11:42:00,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6016 conditions, 3179 events. 1998/3179 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17474 event pairs, 1154 based on Foata normal form. 120/1989 useless extension candidates. Maximal degree in co-relation 5718. Up to 2796 conditions per place. [2023-08-26 11:42:00,599 INFO L140 encePairwiseOnDemand]: 242/252 looper letters, 47 selfloop transitions, 0 changer transitions 0/65 dead transitions. [2023-08-26 11:42:00,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 233 flow [2023-08-26 11:42:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:42:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:42:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 319 transitions. [2023-08-26 11:42:00,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329365079365079 [2023-08-26 11:42:00,616 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 319 transitions. [2023-08-26 11:42:00,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 319 transitions. [2023-08-26 11:42:00,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:00,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 319 transitions. [2023-08-26 11:42:00,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:00,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:00,633 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:00,634 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 159 flow. Second operand 2 states and 319 transitions. [2023-08-26 11:42:00,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 233 flow [2023-08-26 11:42:00,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:42:00,641 INFO L231 Difference]: Finished difference. Result has 58 places, 65 transitions, 134 flow [2023-08-26 11:42:00,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=58, PETRI_TRANSITIONS=65} [2023-08-26 11:42:00,646 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2023-08-26 11:42:00,647 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 65 transitions, 134 flow [2023-08-26 11:42:00,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:00,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:00,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:42:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:42:00,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:00,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash 631236, now seen corresponding path program 1 times [2023-08-26 11:42:00,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:00,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092443916] [2023-08-26 11:42:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:00,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:00,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092443916] [2023-08-26 11:42:00,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092443916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:00,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:00,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40836618] [2023-08-26 11:42:00,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:00,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:00,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:00,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 252 [2023-08-26 11:42:00,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:00,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:00,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 252 [2023-08-26 11:42:00,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:01,134 INFO L124 PetriNetUnfolderBase]: 1960/3107 cut-off events. [2023-08-26 11:42:01,135 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:42:01,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5866 conditions, 3107 events. 1960/3107 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16985 event pairs, 1130 based on Foata normal form. 0/1837 useless extension candidates. Maximal degree in co-relation 5863. Up to 2731 conditions per place. [2023-08-26 11:42:01,152 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 44 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-26 11:42:01,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 220 flow [2023-08-26 11:42:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-26 11:42:01,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145502645502645 [2023-08-26 11:42:01,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-26 11:42:01,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-26 11:42:01,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:01,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-26 11:42:01,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,158 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 134 flow. Second operand 3 states and 389 transitions. [2023-08-26 11:42:01,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 220 flow [2023-08-26 11:42:01,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:01,160 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 132 flow [2023-08-26 11:42:01,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2023-08-26 11:42:01,161 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2023-08-26 11:42:01,161 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 132 flow [2023-08-26 11:42:01,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:01,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:42:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:42:01,162 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:01,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash 631235, now seen corresponding path program 1 times [2023-08-26 11:42:01,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:01,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517212275] [2023-08-26 11:42:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:01,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:01,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:01,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517212275] [2023-08-26 11:42:01,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517212275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:01,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:01,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539222829] [2023-08-26 11:42:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:01,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:01,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 252 [2023-08-26 11:42:01,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:01,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 252 [2023-08-26 11:42:01,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:01,394 INFO L124 PetriNetUnfolderBase]: 1922/3035 cut-off events. [2023-08-26 11:42:01,394 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:42:01,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5732 conditions, 3035 events. 1922/3035 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16560 event pairs, 1106 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 5728. Up to 2667 conditions per place. [2023-08-26 11:42:01,412 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 42 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-26 11:42:01,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 214 flow [2023-08-26 11:42:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-26 11:42:01,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2023-08-26 11:42:01,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-26 11:42:01,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-26 11:42:01,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:01,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-26 11:42:01,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,418 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 132 flow. Second operand 3 states and 381 transitions. [2023-08-26 11:42:01,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 214 flow [2023-08-26 11:42:01,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:01,420 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 129 flow [2023-08-26 11:42:01,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2023-08-26 11:42:01,421 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2023-08-26 11:42:01,421 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 129 flow [2023-08-26 11:42:01,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:01,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:42:01,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:42:01,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:01,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:01,427 INFO L85 PathProgramCache]: Analyzing trace with hash 606632117, now seen corresponding path program 1 times [2023-08-26 11:42:01,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:01,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854113166] [2023-08-26 11:42:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:01,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854113166] [2023-08-26 11:42:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854113166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:42:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641906385] [2023-08-26 11:42:01,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:01,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:01,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:01,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:01,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 252 [2023-08-26 11:42:01,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:01,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 252 [2023-08-26 11:42:01,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:01,761 INFO L124 PetriNetUnfolderBase]: 1417/2269 cut-off events. [2023-08-26 11:42:01,761 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:42:01,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4289 conditions, 2269 events. 1417/2269 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11887 event pairs, 798 based on Foata normal form. 0/1424 useless extension candidates. Maximal degree in co-relation 4285. Up to 1989 conditions per place. [2023-08-26 11:42:01,776 INFO L140 encePairwiseOnDemand]: 250/252 looper letters, 41 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-26 11:42:01,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 211 flow [2023-08-26 11:42:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-08-26 11:42:01,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933862433862434 [2023-08-26 11:42:01,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-08-26 11:42:01,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-08-26 11:42:01,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:01,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-08-26 11:42:01,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,783 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 129 flow. Second operand 3 states and 373 transitions. [2023-08-26 11:42:01,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 211 flow [2023-08-26 11:42:01,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:01,786 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 128 flow [2023-08-26 11:42:01,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2023-08-26 11:42:01,788 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2023-08-26 11:42:01,788 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 128 flow [2023-08-26 11:42:01,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:01,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:42:01,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:42:01,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:01,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:01,790 INFO L85 PathProgramCache]: Analyzing trace with hash 606632116, now seen corresponding path program 1 times [2023-08-26 11:42:01,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:01,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790056774] [2023-08-26 11:42:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:01,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:01,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:01,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790056774] [2023-08-26 11:42:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790056774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:01,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:01,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:42:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443026916] [2023-08-26 11:42:01,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:01,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:01,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 252 [2023-08-26 11:42:01,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:01,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:01,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 252 [2023-08-26 11:42:01,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:02,013 INFO L124 PetriNetUnfolderBase]: 912/1503 cut-off events. [2023-08-26 11:42:02,013 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 11:42:02,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 1503 events. 912/1503 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7479 event pairs, 490 based on Foata normal form. 0/1043 useless extension candidates. Maximal degree in co-relation 2842. Up to 1311 conditions per place. [2023-08-26 11:42:02,021 INFO L140 encePairwiseOnDemand]: 250/252 looper letters, 40 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-26 11:42:02,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 59 transitions, 208 flow [2023-08-26 11:42:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-26 11:42:02,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2023-08-26 11:42:02,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-26 11:42:02,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-26 11:42:02,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:02,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-26 11:42:02,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,027 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 128 flow. Second operand 3 states and 369 transitions. [2023-08-26 11:42:02,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 59 transitions, 208 flow [2023-08-26 11:42:02,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:02,028 INFO L231 Difference]: Finished difference. Result has 57 places, 59 transitions, 127 flow [2023-08-26 11:42:02,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=57, PETRI_TRANSITIONS=59} [2023-08-26 11:42:02,029 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2023-08-26 11:42:02,029 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 59 transitions, 127 flow [2023-08-26 11:42:02,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:02,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:02,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:42:02,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:02,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash -187835850, now seen corresponding path program 1 times [2023-08-26 11:42:02,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:02,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058990533] [2023-08-26 11:42:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:02,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058990533] [2023-08-26 11:42:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058990533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:02,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:02,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:42:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395512810] [2023-08-26 11:42:02,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:02,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 252 [2023-08-26 11:42:02,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:02,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 252 [2023-08-26 11:42:02,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:02,206 INFO L124 PetriNetUnfolderBase]: 992/1659 cut-off events. [2023-08-26 11:42:02,206 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:42:02,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3147 conditions, 1659 events. 992/1659 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8435 event pairs, 353 based on Foata normal form. 0/1178 useless extension candidates. Maximal degree in co-relation 3143. Up to 992 conditions per place. [2023-08-26 11:42:02,214 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 58 selfloop transitions, 5 changer transitions 2/81 dead transitions. [2023-08-26 11:42:02,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 302 flow [2023-08-26 11:42:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-26 11:42:02,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2023-08-26 11:42:02,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-26 11:42:02,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-26 11:42:02,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:02,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-26 11:42:02,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,221 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 127 flow. Second operand 3 states and 440 transitions. [2023-08-26 11:42:02,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 302 flow [2023-08-26 11:42:02,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:02,223 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 160 flow [2023-08-26 11:42:02,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-26 11:42:02,224 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2023-08-26 11:42:02,224 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 160 flow [2023-08-26 11:42:02,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:02,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:02,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:42:02,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr2Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:02,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1300900793, now seen corresponding path program 1 times [2023-08-26 11:42:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279807381] [2023-08-26 11:42:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:02,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:02,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279807381] [2023-08-26 11:42:02,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279807381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:02,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:02,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:42:02,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894092774] [2023-08-26 11:42:02,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:02,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:02,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:02,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 252 [2023-08-26 11:42:02,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:02,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 252 [2023-08-26 11:42:02,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:02,408 INFO L124 PetriNetUnfolderBase]: 864/1463 cut-off events. [2023-08-26 11:42:02,408 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-08-26 11:42:02,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2974 conditions, 1463 events. 864/1463 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7281 event pairs, 353 based on Foata normal form. 38/1180 useless extension candidates. Maximal degree in co-relation 2969. Up to 985 conditions per place. [2023-08-26 11:42:02,418 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 52 selfloop transitions, 4 changer transitions 6/78 dead transitions. [2023-08-26 11:42:02,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 319 flow [2023-08-26 11:42:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-08-26 11:42:02,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578042328042328 [2023-08-26 11:42:02,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-08-26 11:42:02,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-08-26 11:42:02,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:02,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-08-26 11:42:02,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,427 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 160 flow. Second operand 3 states and 437 transitions. [2023-08-26 11:42:02,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 319 flow [2023-08-26 11:42:02,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:42:02,433 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 160 flow [2023-08-26 11:42:02,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2023-08-26 11:42:02,434 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2023-08-26 11:42:02,435 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 160 flow [2023-08-26 11:42:02,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:02,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:02,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:42:02,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:02,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -396169781, now seen corresponding path program 1 times [2023-08-26 11:42:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:02,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926810581] [2023-08-26 11:42:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:02,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:02,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:02,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926810581] [2023-08-26 11:42:02,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926810581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:02,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:02,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:42:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066444411] [2023-08-26 11:42:02,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:02,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:02,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:02,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 252 [2023-08-26 11:42:02,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:02,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 252 [2023-08-26 11:42:02,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:02,735 INFO L124 PetriNetUnfolderBase]: 1672/2781 cut-off events. [2023-08-26 11:42:02,736 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2023-08-26 11:42:02,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5760 conditions, 2781 events. 1672/2781 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14862 event pairs, 461 based on Foata normal form. 0/2310 useless extension candidates. Maximal degree in co-relation 5754. Up to 1433 conditions per place. [2023-08-26 11:42:02,748 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 71 selfloop transitions, 4 changer transitions 12/99 dead transitions. [2023-08-26 11:42:02,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 444 flow [2023-08-26 11:42:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-26 11:42:02,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2023-08-26 11:42:02,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-26 11:42:02,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-26 11:42:02,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:02,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-26 11:42:02,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,773 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 160 flow. Second operand 3 states and 426 transitions. [2023-08-26 11:42:02,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 444 flow [2023-08-26 11:42:02,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 99 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:02,779 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 190 flow [2023-08-26 11:42:02,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-08-26 11:42:02,780 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-08-26 11:42:02,780 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 190 flow [2023-08-26 11:42:02,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:02,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:42:02,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:02,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash -70368695, now seen corresponding path program 2 times [2023-08-26 11:42:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814683557] [2023-08-26 11:42:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:02,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:02,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814683557] [2023-08-26 11:42:02,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814683557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:02,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:02,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:02,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848483814] [2023-08-26 11:42:02,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:02,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:02,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:02,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:02,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 252 [2023-08-26 11:42:02,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:02,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:02,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 252 [2023-08-26 11:42:02,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:03,401 INFO L124 PetriNetUnfolderBase]: 4039/6813 cut-off events. [2023-08-26 11:42:03,401 INFO L125 PetriNetUnfolderBase]: For 1202/1208 co-relation queries the response was YES. [2023-08-26 11:42:03,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14321 conditions, 6813 events. 4039/6813 cut-off events. For 1202/1208 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 42536 event pairs, 846 based on Foata normal form. 44/5568 useless extension candidates. Maximal degree in co-relation 14314. Up to 2366 conditions per place. [2023-08-26 11:42:03,445 INFO L140 encePairwiseOnDemand]: 246/252 looper letters, 128 selfloop transitions, 8 changer transitions 1/154 dead transitions. [2023-08-26 11:42:03,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 154 transitions, 714 flow [2023-08-26 11:42:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:42:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:42:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 751 transitions. [2023-08-26 11:42:03,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596031746031746 [2023-08-26 11:42:03,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 751 transitions. [2023-08-26 11:42:03,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 751 transitions. [2023-08-26 11:42:03,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:03,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 751 transitions. [2023-08-26 11:42:03,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:03,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:03,453 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:03,453 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 190 flow. Second operand 5 states and 751 transitions. [2023-08-26 11:42:03,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 154 transitions, 714 flow [2023-08-26 11:42:03,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 154 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:42:03,459 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 254 flow [2023-08-26 11:42:03,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2023-08-26 11:42:03,460 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 6 predicate places. [2023-08-26 11:42:03,460 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 254 flow [2023-08-26 11:42:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:03,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:03,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:03,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:42:03,461 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:03,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash -9746583, now seen corresponding path program 3 times [2023-08-26 11:42:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:03,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338553011] [2023-08-26 11:42:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:03,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:03,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338553011] [2023-08-26 11:42:03,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338553011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:03,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:03,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:03,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765811242] [2023-08-26 11:42:03,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:03,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 252 [2023-08-26 11:42:03,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:03,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:03,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 252 [2023-08-26 11:42:03,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:04,091 INFO L124 PetriNetUnfolderBase]: 4533/7728 cut-off events. [2023-08-26 11:42:04,091 INFO L125 PetriNetUnfolderBase]: For 2679/2793 co-relation queries the response was YES. [2023-08-26 11:42:04,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17398 conditions, 7728 events. 4533/7728 cut-off events. For 2679/2793 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 49967 event pairs, 1427 based on Foata normal form. 252/7031 useless extension candidates. Maximal degree in co-relation 17388. Up to 4053 conditions per place. [2023-08-26 11:42:04,131 INFO L140 encePairwiseOnDemand]: 238/252 looper letters, 89 selfloop transitions, 16 changer transitions 16/139 dead transitions. [2023-08-26 11:42:04,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 139 transitions, 697 flow [2023-08-26 11:42:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:42:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:42:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-08-26 11:42:04,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515079365079365 [2023-08-26 11:42:04,134 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-08-26 11:42:04,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-08-26 11:42:04,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:04,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-08-26 11:42:04,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,138 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,138 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 254 flow. Second operand 5 states and 649 transitions. [2023-08-26 11:42:04,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 139 transitions, 697 flow [2023-08-26 11:42:04,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 139 transitions, 697 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:04,144 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 381 flow [2023-08-26 11:42:04,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2023-08-26 11:42:04,145 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 13 predicate places. [2023-08-26 11:42:04,145 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 381 flow [2023-08-26 11:42:04,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:04,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:04,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:42:04,146 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:04,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1811308405, now seen corresponding path program 4 times [2023-08-26 11:42:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:04,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295014483] [2023-08-26 11:42:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295014483] [2023-08-26 11:42:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295014483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:04,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:04,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:04,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594017157] [2023-08-26 11:42:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:04,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:04,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 252 [2023-08-26 11:42:04,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 381 flow. Second operand has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:04,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 252 [2023-08-26 11:42:04,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:04,787 INFO L124 PetriNetUnfolderBase]: 3713/6880 cut-off events. [2023-08-26 11:42:04,787 INFO L125 PetriNetUnfolderBase]: For 4835/5195 co-relation queries the response was YES. [2023-08-26 11:42:04,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18086 conditions, 6880 events. 3713/6880 cut-off events. For 4835/5195 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 47182 event pairs, 744 based on Foata normal form. 248/6520 useless extension candidates. Maximal degree in co-relation 18072. Up to 1913 conditions per place. [2023-08-26 11:42:04,822 INFO L140 encePairwiseOnDemand]: 246/252 looper letters, 119 selfloop transitions, 11 changer transitions 23/174 dead transitions. [2023-08-26 11:42:04,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 174 transitions, 1083 flow [2023-08-26 11:42:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:42:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:42:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 741 transitions. [2023-08-26 11:42:04,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880952380952381 [2023-08-26 11:42:04,825 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 741 transitions. [2023-08-26 11:42:04,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 741 transitions. [2023-08-26 11:42:04,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:04,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 741 transitions. [2023-08-26 11:42:04,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,829 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,829 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 381 flow. Second operand 5 states and 741 transitions. [2023-08-26 11:42:04,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 174 transitions, 1083 flow [2023-08-26 11:42:04,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 174 transitions, 1063 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:04,840 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 430 flow [2023-08-26 11:42:04,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-08-26 11:42:04,840 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 20 predicate places. [2023-08-26 11:42:04,841 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 430 flow [2023-08-26 11:42:04,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:04,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:42:04,841 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:04,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash -91530308, now seen corresponding path program 1 times [2023-08-26 11:42:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:04,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147911674] [2023-08-26 11:42:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:04,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:04,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:04,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147911674] [2023-08-26 11:42:04,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147911674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:04,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:04,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:04,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927937152] [2023-08-26 11:42:04,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:04,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:04,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 252 [2023-08-26 11:42:04,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:04,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:04,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 252 [2023-08-26 11:42:04,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:05,346 INFO L124 PetriNetUnfolderBase]: 2525/4762 cut-off events. [2023-08-26 11:42:05,347 INFO L125 PetriNetUnfolderBase]: For 4579/4915 co-relation queries the response was YES. [2023-08-26 11:42:05,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12415 conditions, 4762 events. 2525/4762 cut-off events. For 4579/4915 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 30864 event pairs, 862 based on Foata normal form. 206/4570 useless extension candidates. Maximal degree in co-relation 12398. Up to 2276 conditions per place. [2023-08-26 11:42:05,367 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 67 selfloop transitions, 8 changer transitions 11/121 dead transitions. [2023-08-26 11:42:05,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 751 flow [2023-08-26 11:42:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:42:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:42:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 680 transitions. [2023-08-26 11:42:05,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-08-26 11:42:05,369 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 680 transitions. [2023-08-26 11:42:05,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 680 transitions. [2023-08-26 11:42:05,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:05,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 680 transitions. [2023-08-26 11:42:05,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,374 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,374 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 430 flow. Second operand 5 states and 680 transitions. [2023-08-26 11:42:05,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 751 flow [2023-08-26 11:42:05,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 719 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:05,382 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 454 flow [2023-08-26 11:42:05,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2023-08-26 11:42:05,383 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 27 predicate places. [2023-08-26 11:42:05,383 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 454 flow [2023-08-26 11:42:05,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:05,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:05,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:42:05,384 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:05,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash 586314890, now seen corresponding path program 1 times [2023-08-26 11:42:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:05,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91156946] [2023-08-26 11:42:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91156946] [2023-08-26 11:42:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91156946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:05,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:05,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695949320] [2023-08-26 11:42:05,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:05,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:05,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 252 [2023-08-26 11:42:05,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 454 flow. Second operand has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:05,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 252 [2023-08-26 11:42:05,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:05,712 INFO L124 PetriNetUnfolderBase]: 1387/2732 cut-off events. [2023-08-26 11:42:05,712 INFO L125 PetriNetUnfolderBase]: For 3256/3479 co-relation queries the response was YES. [2023-08-26 11:42:05,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7657 conditions, 2732 events. 1387/2732 cut-off events. For 3256/3479 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 16878 event pairs, 460 based on Foata normal form. 126/2622 useless extension candidates. Maximal degree in co-relation 7636. Up to 1364 conditions per place. [2023-08-26 11:42:05,726 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 0 selfloop transitions, 0 changer transitions 113/113 dead transitions. [2023-08-26 11:42:05,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 113 transitions, 686 flow [2023-08-26 11:42:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:42:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:42:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2023-08-26 11:42:05,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-08-26 11:42:05,729 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2023-08-26 11:42:05,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2023-08-26 11:42:05,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:05,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2023-08-26 11:42:05,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,733 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 454 flow. Second operand 5 states and 675 transitions. [2023-08-26 11:42:05,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 113 transitions, 686 flow [2023-08-26 11:42:05,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 113 transitions, 680 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:05,743 INFO L231 Difference]: Finished difference. Result has 91 places, 0 transitions, 0 flow [2023-08-26 11:42:05,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=91, PETRI_TRANSITIONS=0} [2023-08-26 11:42:05,744 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 29 predicate places. [2023-08-26 11:42:05,744 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 0 transitions, 0 flow [2023-08-26 11:42:05,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:05,746 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (13 of 14 remaining) [2023-08-26 11:42:05,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (12 of 14 remaining) [2023-08-26 11:42:05,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2023-08-26 11:42:05,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-08-26 11:42:05,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2023-08-26 11:42:05,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2023-08-26 11:42:05,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2023-08-26 11:42:05,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2023-08-26 11:42:05,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2023-08-26 11:42:05,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2023-08-26 11:42:05,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 14 remaining) [2023-08-26 11:42:05,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2023-08-26 11:42:05,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (1 of 14 remaining) [2023-08-26 11:42:05,749 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 14 remaining) [2023-08-26 11:42:05,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:42:05,749 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:05,753 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 11:42:05,754 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 11:42:05,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 11:42:05 BasicIcfg [2023-08-26 11:42:05,756 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 11:42:05,757 INFO L158 Benchmark]: Toolchain (without parser) took 9070.29ms. Allocated memory was 400.6MB in the beginning and 578.8MB in the end (delta: 178.3MB). Free memory was 374.7MB in the beginning and 375.0MB in the end (delta: -334.1kB). Peak memory consumption was 181.4MB. Max. memory is 16.0GB. [2023-08-26 11:42:05,757 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 400.6MB. Free memory was 377.4MB in the beginning and 377.2MB in the end (delta: 169.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:42:05,757 INFO L158 Benchmark]: CACSL2BoogieTranslator took 474.74ms. Allocated memory is still 400.6MB. Free memory was 373.9MB in the beginning and 353.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 11:42:05,758 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.40ms. Allocated memory is still 400.6MB. Free memory was 353.3MB in the beginning and 351.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:42:05,758 INFO L158 Benchmark]: Boogie Preprocessor took 52.37ms. Allocated memory is still 400.6MB. Free memory was 351.3MB in the beginning and 349.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:42:05,758 INFO L158 Benchmark]: RCFGBuilder took 448.18ms. Allocated memory is still 400.6MB. Free memory was 349.3MB in the beginning and 332.1MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 11:42:05,758 INFO L158 Benchmark]: TraceAbstraction took 8024.01ms. Allocated memory was 400.6MB in the beginning and 578.8MB in the end (delta: 178.3MB). Free memory was 331.2MB in the beginning and 375.0MB in the end (delta: -43.8MB). Peak memory consumption was 137.3MB. Max. memory is 16.0GB. [2023-08-26 11:42:05,759 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 400.6MB. Free memory was 377.4MB in the beginning and 377.2MB in the end (delta: 169.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 474.74ms. Allocated memory is still 400.6MB. Free memory was 373.9MB in the beginning and 353.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 65.40ms. Allocated memory is still 400.6MB. Free memory was 353.3MB in the beginning and 351.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 52.37ms. Allocated memory is still 400.6MB. Free memory was 351.3MB in the beginning and 349.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 448.18ms. Allocated memory is still 400.6MB. Free memory was 349.3MB in the beginning and 332.1MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 8024.01ms. Allocated memory was 400.6MB in the beginning and 578.8MB in the end (delta: 178.3MB). Free memory was 331.2MB in the beginning and 375.0MB in the end (delta: -43.8MB). Peak memory consumption was 137.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 265]: Unsoundness Warning unspecified type, defaulting to int C: short [265] - GenericResultAtLocation [Line: 265]: Unsoundness Warning unspecified type, defaulting to int C: short [265] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 119 PlacesBefore, 62 PlacesAfterwards, 138 TransitionsBefore, 75 TransitionsAfterwards, 7056 CoEnabledTransitionPairs, 5 FixpointIterations, 26 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 6 ChoiceCompositions, 103 TotalNumberOfCompositions, 18504 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8176, independent: 7820, independent conditional: 0, independent unconditional: 7820, dependent: 356, dependent conditional: 0, dependent unconditional: 356, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3489, independent: 3431, independent conditional: 0, independent unconditional: 3431, dependent: 58, dependent conditional: 0, dependent unconditional: 58, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8176, independent: 4389, independent conditional: 0, independent unconditional: 4389, dependent: 298, dependent conditional: 0, dependent unconditional: 298, unknown: 3489, unknown conditional: 0, unknown unconditional: 3489] , Statistics on independence cache: Total cache size (in pairs): 559, Positive cache size: 515, Positive conditional cache size: 0, Positive unconditional cache size: 515, Negative cache size: 44, Negative conditional cache size: 0, Negative unconditional cache size: 44, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 12]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 12]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 200 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.9s, OverallIterations: 13, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 545 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 545 mSDsluCounter, 54 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1443 IncrementalHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 38 mSDtfsCounter, 1443 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=454occurred in iteration=12, InterpolantAutomatonStates: 48, 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, 0.6s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 146 ConstructedInterpolants, 0 QuantifiedInterpolants, 336 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 11:42:05,781 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...