/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:24:17,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:24:17,732 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 18:24:17,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:24:17,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:24:17,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:24:17,770 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:24:17,770 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:24:17,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:24:17,774 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:24:17,775 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:24:17,775 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:24:17,775 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:24:17,776 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:24:17,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:24:17,777 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:24:17,777 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:24:17,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:24:17,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:24:17,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:24:17,777 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:24:17,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:24:17,778 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:24:17,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:24:17,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:24:17,779 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:24:17,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:24:17,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:24:17,780 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:24:17,780 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:24:17,781 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:24:17,781 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:24:17,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:24:17,782 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:24:17,782 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:24:17,782 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:24:18,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:24:18,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:24:18,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:24:18,128 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:24:18,133 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:24:18,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i [2023-08-26 18:24:19,445 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:24:19,720 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:24:19,720 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i [2023-08-26 18:24:19,745 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/418b9ced0/ba1c7aadaf9a4bca8949abf64888fe52/FLAG9ed72bd14 [2023-08-26 18:24:19,757 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/418b9ced0/ba1c7aadaf9a4bca8949abf64888fe52 [2023-08-26 18:24:19,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:24:19,759 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:24:19,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:24:19,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:24:19,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:24:19,763 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:24:19" (1/1) ... [2023-08-26 18:24:19,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d954652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:19, skipping insertion in model container [2023-08-26 18:24:19,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:24:19" (1/1) ... [2023-08-26 18:24:19,809 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:24:20,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:24:20,240 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:24:20,271 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:24:20,272 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:24:20,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:24:20,368 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:24:20,368 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:24:20,374 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:24:20,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20 WrapperNode [2023-08-26 18:24:20,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:24:20,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:24:20,376 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:24:20,376 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:24:20,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,421 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,455 INFO L138 Inliner]: procedures = 177, calls = 90, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 187 [2023-08-26 18:24:20,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:24:20,456 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:24:20,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:24:20,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:24:20,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,475 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,475 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,484 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,486 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,490 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,492 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:24:20,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:24:20,497 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:24:20,497 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:24:20,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (1/1) ... [2023-08-26 18:24:20,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:24:20,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:24:20,537 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 18:24:20,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 18:24:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:24:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:24:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:24:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:24:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:24:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:24:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:24:20,568 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:24:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:24:20,568 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:24:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:24:20,568 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:24:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 18:24:20,569 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 18:24:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:24:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:24:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:24:20,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:24:20,571 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 18:24:20,707 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:24:20,708 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:24:21,192 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:24:21,668 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:24:21,669 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:24:21,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:24:21 BoogieIcfgContainer [2023-08-26 18:24:21,671 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:24:21,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:24:21,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:24:21,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:24:21,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:24:19" (1/3) ... [2023-08-26 18:24:21,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6986626e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:24:21, skipping insertion in model container [2023-08-26 18:24:21,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:24:20" (2/3) ... [2023-08-26 18:24:21,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6986626e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:24:21, skipping insertion in model container [2023-08-26 18:24:21,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:24:21" (3/3) ... [2023-08-26 18:24:21,680 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.opt.i [2023-08-26 18:24:21,696 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:24:21,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2023-08-26 18:24:21,697 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:24:21,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:24:21,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 206 transitions, 432 flow [2023-08-26 18:24:21,996 INFO L124 PetriNetUnfolderBase]: 3/202 cut-off events. [2023-08-26 18:24:21,996 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:24:22,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 3/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 337 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 144. Up to 2 conditions per place. [2023-08-26 18:24:22,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 206 transitions, 432 flow [2023-08-26 18:24:22,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 202 transitions, 416 flow [2023-08-26 18:24:22,018 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:24:22,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 202 transitions, 416 flow [2023-08-26 18:24:22,036 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 202 transitions, 416 flow [2023-08-26 18:24:22,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 202 transitions, 416 flow [2023-08-26 18:24:22,109 INFO L124 PetriNetUnfolderBase]: 3/202 cut-off events. [2023-08-26 18:24:22,110 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:24:22,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 3/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 335 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 144. Up to 2 conditions per place. [2023-08-26 18:24:22,124 INFO L119 LiptonReduction]: Number of co-enabled transitions 10118 [2023-08-26 18:24:30,802 INFO L134 LiptonReduction]: Checked pairs total: 65446 [2023-08-26 18:24:30,802 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-26 18:24:30,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:24:30,821 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;@39d3cb91, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:24:30,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 95 error locations. [2023-08-26 18:24:30,823 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:24:30,823 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:24:30,823 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:24:30,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:24:30,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:24:30,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:24:30,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:24:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1193, now seen corresponding path program 1 times [2023-08-26 18:24:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:24:30,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029085929] [2023-08-26 18:24:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:24:30,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:24:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:24:30,953 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 18:24:30,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:24:30,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029085929] [2023-08-26 18:24:30,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029085929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:24:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:24:30,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:24:30,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241663460] [2023-08-26 18:24:30,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:24:30,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:24:30,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:24:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:24:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:24:30,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 357 [2023-08-26 18:24:31,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 198 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:24:31,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:24:31,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 357 [2023-08-26 18:24:31,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:22,077 INFO L124 PetriNetUnfolderBase]: 384426/495344 cut-off events. [2023-08-26 18:25:22,077 INFO L125 PetriNetUnfolderBase]: For 881/881 co-relation queries the response was YES. [2023-08-26 18:25:22,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992139 conditions, 495344 events. 384426/495344 cut-off events. For 881/881 co-relation queries the response was YES. Maximal size of possible extension queue 30655. Compared 3615281 event pairs, 384426 based on Foata normal form. 0/195209 useless extension candidates. Maximal degree in co-relation 992127. Up to 495012 conditions per place. [2023-08-26 18:25:25,090 INFO L140 encePairwiseOnDemand]: 328/357 looper letters, 57 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2023-08-26 18:25:25,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 63 transitions, 252 flow [2023-08-26 18:25:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:25:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:25:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 376 transitions. [2023-08-26 18:25:25,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266106442577031 [2023-08-26 18:25:25,101 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 376 transitions. [2023-08-26 18:25:25,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 376 transitions. [2023-08-26 18:25:25,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:25,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 376 transitions. [2023-08-26 18:25:25,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 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 18:25:25,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 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 18:25:25,114 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 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 18:25:25,116 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 198 flow. Second operand 2 states and 376 transitions. [2023-08-26 18:25:25,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 63 transitions, 252 flow [2023-08-26 18:25:25,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:25:25,159 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 134 flow [2023-08-26 18:25:25,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2023-08-26 18:25:25,164 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -32 predicate places. [2023-08-26 18:25:25,164 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 134 flow [2023-08-26 18:25:25,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:25,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:25,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:25:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:25:25,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:25:25,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash 36574379, now seen corresponding path program 1 times [2023-08-26 18:25:25,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:25,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234896185] [2023-08-26 18:25:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:25,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:25,445 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 18:25:25,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:25,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234896185] [2023-08-26 18:25:25,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234896185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:25,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:25,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:25:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819962648] [2023-08-26 18:25:25,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:25,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:25:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:25:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:25:25,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 357 [2023-08-26 18:25:25,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 18:25:25,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:25,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 357 [2023-08-26 18:25:25,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:39,575 INFO L124 PetriNetUnfolderBase]: 113706/148115 cut-off events. [2023-08-26 18:25:39,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:39,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297035 conditions, 148115 events. 113706/148115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7271. Compared 932103 event pairs, 113706 based on Foata normal form. 0/80806 useless extension candidates. Maximal degree in co-relation 297032. Up to 148003 conditions per place. [2023-08-26 18:25:40,462 INFO L140 encePairwiseOnDemand]: 342/357 looper letters, 47 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-26 18:25:40,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 202 flow [2023-08-26 18:25:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-26 18:25:40,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996265172735761 [2023-08-26 18:25:40,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-26 18:25:40,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-26 18:25:40,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:40,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-26 18:25:40,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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 18:25:40,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:25:40,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:25:40,479 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 134 flow. Second operand 3 states and 428 transitions. [2023-08-26 18:25:40,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 202 flow [2023-08-26 18:25:40,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:25:40,482 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 108 flow [2023-08-26 18:25:40,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-08-26 18:25:40,484 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -44 predicate places. [2023-08-26 18:25:40,484 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 108 flow [2023-08-26 18:25:40,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 18:25:40,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:40,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:25:40,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:25:40,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:25:40,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash 36574378, now seen corresponding path program 1 times [2023-08-26 18:25:40,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:40,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582050007] [2023-08-26 18:25:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:40,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:40,588 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 18:25:40,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:40,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582050007] [2023-08-26 18:25:40,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582050007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:40,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:40,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:25:40,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583141913] [2023-08-26 18:25:40,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:40,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:25:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:25:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:25:40,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 357 [2023-08-26 18:25:40,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 18:25:40,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:40,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 357 [2023-08-26 18:25:40,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:46,712 INFO L124 PetriNetUnfolderBase]: 50986/72014 cut-off events. [2023-08-26 18:25:46,712 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:46,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143309 conditions, 72014 events. 50986/72014 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4068. Compared 504553 event pairs, 28634 based on Foata normal form. 0/56306 useless extension candidates. Maximal degree in co-relation 143305. Up to 36377 conditions per place. [2023-08-26 18:25:47,045 INFO L140 encePairwiseOnDemand]: 331/357 looper letters, 49 selfloop transitions, 12 changer transitions 0/62 dead transitions. [2023-08-26 18:25:47,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 256 flow [2023-08-26 18:25:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-26 18:25:47,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39775910364145656 [2023-08-26 18:25:47,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-26 18:25:47,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-26 18:25:47,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:47,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-26 18:25:47,048 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 18:25:47,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:25:47,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:25:47,051 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 108 flow. Second operand 3 states and 426 transitions. [2023-08-26 18:25:47,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 256 flow [2023-08-26 18:25:47,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:25:47,053 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 211 flow [2023-08-26 18:25:47,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-26 18:25:47,054 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -44 predicate places. [2023-08-26 18:25:47,054 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 211 flow [2023-08-26 18:25:47,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 18:25:47,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:47,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:47,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:25:47,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:25:47,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 981823837, now seen corresponding path program 1 times [2023-08-26 18:25:47,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:47,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485845590] [2023-08-26 18:25:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:47,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:47,437 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 18:25:47,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:47,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485845590] [2023-08-26 18:25:47,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485845590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:47,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:47,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:25:47,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149315452] [2023-08-26 18:25:47,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:47,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:25:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:25:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:25:47,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-08-26 18:25:47,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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 18:25:47,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:47,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-08-26 18:25:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:54,786 INFO L124 PetriNetUnfolderBase]: 59549/82736 cut-off events. [2023-08-26 18:25:54,786 INFO L125 PetriNetUnfolderBase]: For 34613/35374 co-relation queries the response was YES. [2023-08-26 18:25:54,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236676 conditions, 82736 events. 59549/82736 cut-off events. For 34613/35374 co-relation queries the response was YES. Maximal size of possible extension queue 3733. Compared 564140 event pairs, 15559 based on Foata normal form. 120/74537 useless extension candidates. Maximal degree in co-relation 236671. Up to 75597 conditions per place. [2023-08-26 18:25:55,238 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 81 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-08-26 18:25:55,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 505 flow [2023-08-26 18:25:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-26 18:25:55,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2023-08-26 18:25:55,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-26 18:25:55,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-26 18:25:55,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:55,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-26 18:25:55,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 18:25:55,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:25:55,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:25:55,244 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 211 flow. Second operand 3 states and 492 transitions. [2023-08-26 18:25:55,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 505 flow [2023-08-26 18:25:55,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:55,732 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 206 flow [2023-08-26 18:25:55,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-08-26 18:25:55,733 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -43 predicate places. [2023-08-26 18:25:55,733 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 206 flow [2023-08-26 18:25:55,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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 18:25:55,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:55,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:55,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:25:55,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:25:55,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:55,734 INFO L85 PathProgramCache]: Analyzing trace with hash 981823576, now seen corresponding path program 1 times [2023-08-26 18:25:55,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:55,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423001415] [2023-08-26 18:25:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:55,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:55,837 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 18:25:55,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423001415] [2023-08-26 18:25:55,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423001415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:55,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:55,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:25:55,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012563416] [2023-08-26 18:25:55,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:55,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:25:55,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:55,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:25:55,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:25:55,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-08-26 18:25:55,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 18:25:55,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:55,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-08-26 18:25:55,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:26:02,854 INFO L124 PetriNetUnfolderBase]: 55712/78483 cut-off events. [2023-08-26 18:26:02,854 INFO L125 PetriNetUnfolderBase]: For 14343/14758 co-relation queries the response was YES. [2023-08-26 18:26:03,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213540 conditions, 78483 events. 55712/78483 cut-off events. For 14343/14758 co-relation queries the response was YES. Maximal size of possible extension queue 3769. Compared 544628 event pairs, 25228 based on Foata normal form. 0/61049 useless extension candidates. Maximal degree in co-relation 213534. Up to 58031 conditions per place. [2023-08-26 18:26:03,332 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 81 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-08-26 18:26:03,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 491 flow [2023-08-26 18:26:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:26:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:26:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-26 18:26:03,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2023-08-26 18:26:03,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-26 18:26:03,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-26 18:26:03,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:26:03,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-26 18:26:03,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 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 18:26:03,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:26:03,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:26:03,338 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 206 flow. Second operand 3 states and 501 transitions. [2023-08-26 18:26:03,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 491 flow [2023-08-26 18:26:03,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:26:03,341 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 216 flow [2023-08-26 18:26:03,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-08-26 18:26:03,342 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -41 predicate places. [2023-08-26 18:26:03,342 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 216 flow [2023-08-26 18:26:03,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 18:26:03,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:26:03,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:26:03,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:26:03,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:26:03,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:26:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash 371766770, now seen corresponding path program 1 times [2023-08-26 18:26:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:26:03,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260156247] [2023-08-26 18:26:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:26:03,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:26:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:26:03,429 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 18:26:03,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:26:03,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260156247] [2023-08-26 18:26:03,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260156247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:26:03,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:26:03,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:26:03,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809759732] [2023-08-26 18:26:03,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:26:03,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:26:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:26:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:26:03,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:26:03,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 357 [2023-08-26 18:26:03,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 18:26:03,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:26:03,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 357 [2023-08-26 18:26:03,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:26:11,312 INFO L124 PetriNetUnfolderBase]: 62485/89713 cut-off events. [2023-08-26 18:26:11,312 INFO L125 PetriNetUnfolderBase]: For 20875/20875 co-relation queries the response was YES. [2023-08-26 18:26:11,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251135 conditions, 89713 events. 62485/89713 cut-off events. For 20875/20875 co-relation queries the response was YES. Maximal size of possible extension queue 4540. Compared 654283 event pairs, 29488 based on Foata normal form. 0/74981 useless extension candidates. Maximal degree in co-relation 251128. Up to 68769 conditions per place. [2023-08-26 18:26:12,000 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 73 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2023-08-26 18:26:12,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 446 flow [2023-08-26 18:26:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:26:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:26:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-26 18:26:12,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.388422035480859 [2023-08-26 18:26:12,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-26 18:26:12,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-26 18:26:12,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:26:12,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-26 18:26:12,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 18:26:12,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:26:12,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:26:12,006 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 216 flow. Second operand 3 states and 416 transitions. [2023-08-26 18:26:12,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 446 flow [2023-08-26 18:26:12,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:26:12,021 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 248 flow [2023-08-26 18:26:12,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-26 18:26:12,021 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -41 predicate places. [2023-08-26 18:26:12,022 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 248 flow [2023-08-26 18:26:12,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 18:26:12,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:26:12,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:26:12,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:26:12,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:26:12,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:26:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash 371766771, now seen corresponding path program 1 times [2023-08-26 18:26:12,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:26:12,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669951428] [2023-08-26 18:26:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:26:12,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:26:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:26:12,263 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 18:26:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:26:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669951428] [2023-08-26 18:26:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669951428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:26:12,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:26:12,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:26:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744066573] [2023-08-26 18:26:12,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:26:12,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:26:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:26:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:26:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:26:12,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 357 [2023-08-26 18:26:12,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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 18:26:12,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:26:12,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 357 [2023-08-26 18:26:12,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:26:25,108 INFO L124 PetriNetUnfolderBase]: 101472/144800 cut-off events. [2023-08-26 18:26:25,109 INFO L125 PetriNetUnfolderBase]: For 57165/57165 co-relation queries the response was YES. [2023-08-26 18:26:25,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421367 conditions, 144800 events. 101472/144800 cut-off events. For 57165/57165 co-relation queries the response was YES. Maximal size of possible extension queue 7427. Compared 1106941 event pairs, 50740 based on Foata normal form. 300/118692 useless extension candidates. Maximal degree in co-relation 421359. Up to 72692 conditions per place. [2023-08-26 18:26:26,029 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 98 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-08-26 18:26:26,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 613 flow [2023-08-26 18:26:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:26:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:26:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2023-08-26 18:26:26,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39355742296918766 [2023-08-26 18:26:26,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2023-08-26 18:26:26,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2023-08-26 18:26:26,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:26:26,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2023-08-26 18:26:26,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 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 18:26:26,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 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 18:26:26,036 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 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 18:26:26,036 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 248 flow. Second operand 4 states and 562 transitions. [2023-08-26 18:26:26,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 613 flow [2023-08-26 18:26:27,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 104 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:26:27,421 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 259 flow [2023-08-26 18:26:27,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-26 18:26:27,421 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -38 predicate places. [2023-08-26 18:26:27,422 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 259 flow [2023-08-26 18:26:27,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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 18:26:27,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:26:27,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:26:27,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:26:27,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:26:27,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:26:27,423 INFO L85 PathProgramCache]: Analyzing trace with hash -811770917, now seen corresponding path program 2 times [2023-08-26 18:26:27,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:26:27,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544068909] [2023-08-26 18:26:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:26:27,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:26:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:26:27,611 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 18:26:27,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:26:27,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544068909] [2023-08-26 18:26:27,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544068909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:26:27,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:26:27,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:26:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617621264] [2023-08-26 18:26:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:26:27,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:26:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:26:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:26:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:26:27,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 357 [2023-08-26 18:26:27,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:26:27,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:26:27,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 357 [2023-08-26 18:26:27,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:26:40,216 INFO L124 PetriNetUnfolderBase]: 100607/143635 cut-off events. [2023-08-26 18:26:40,217 INFO L125 PetriNetUnfolderBase]: For 65995/65995 co-relation queries the response was YES. [2023-08-26 18:26:40,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417385 conditions, 143635 events. 100607/143635 cut-off events. For 65995/65995 co-relation queries the response was YES. Maximal size of possible extension queue 7404. Compared 1098247 event pairs, 42684 based on Foata normal form. 300/117527 useless extension candidates. Maximal degree in co-relation 417376. Up to 125271 conditions per place. [2023-08-26 18:26:41,127 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 91 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-08-26 18:26:41,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 571 flow [2023-08-26 18:26:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:26:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:26:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-08-26 18:26:41,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900560224089636 [2023-08-26 18:26:41,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-08-26 18:26:41,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-08-26 18:26:41,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:26:41,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-08-26 18:26:41,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 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 18:26:41,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 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 18:26:41,133 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 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 18:26:41,133 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 259 flow. Second operand 4 states and 557 transitions. [2023-08-26 18:26:41,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 571 flow [2023-08-26 18:26:41,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 563 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:26:41,409 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 251 flow [2023-08-26 18:26:41,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-26 18:26:41,409 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -39 predicate places. [2023-08-26 18:26:41,409 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 251 flow [2023-08-26 18:26:41,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:26:41,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:26:41,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:26:41,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:26:41,410 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 18:26:41,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:26:41,410 INFO L85 PathProgramCache]: Analyzing trace with hash 371872431, now seen corresponding path program 1 times [2023-08-26 18:26:41,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:26:41,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11874945] [2023-08-26 18:26:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:26:41,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:26:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:26:41,581 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 18:26:41,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:26:41,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11874945] [2023-08-26 18:26:41,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11874945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:26:41,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:26:41,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:26:41,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946248406] [2023-08-26 18:26:41,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:26:41,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:26:41,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:26:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:26:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:26:41,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 357 [2023-08-26 18:26:41,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 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 18:26:41,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:26:41,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 357 [2023-08-26 18:26:41,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand