/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:13:28,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:13:28,879 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 12:13:28,882 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:13:28,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:13:28,908 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:13:28,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:13:28,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:13:28,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:13:28,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:13:28,916 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:13:28,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:13:28,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:13:28,917 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:13:28,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:13:28,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:13:28,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:13:28,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:13:28,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:13:28,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:13:28,918 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:13:28,919 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:13:28,919 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:13:28,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:13:28,920 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:13:28,920 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:13:28,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:13:28,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:13:28,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:13:28,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:13:28,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:13:28,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:13:28,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:13:28,922 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:13:28,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:13:28,922 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:13:29,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:13:29,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:13:29,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:13:29,207 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:13:29,207 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:13:29,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i [2023-08-26 12:13:30,261 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:13:30,506 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:13:30,506 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i [2023-08-26 12:13:30,523 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93162cb5/4061c667526d4364a389876add2348f0/FLAGb00630b7c [2023-08-26 12:13:30,534 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93162cb5/4061c667526d4364a389876add2348f0 [2023-08-26 12:13:30,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:13:30,539 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:13:30,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:13:30,541 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:13:30,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:13:30,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2760be19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30, skipping insertion in model container [2023-08-26 12:13:30,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,588 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:13:30,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:13:30,892 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:13:30,926 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:13:30,928 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:13:30,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:13:30,991 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:13:30,991 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:13:30,996 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:13:30,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30 WrapperNode [2023-08-26 12:13:30,996 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:13:30,997 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:13:30,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:13:30,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:13:31,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,035 INFO L138 Inliner]: procedures = 177, calls = 92, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 187 [2023-08-26 12:13:31,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:13:31,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:13:31,036 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:13:31,036 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:13:31,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,052 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,054 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,060 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:13:31,060 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:13:31,060 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:13:31,060 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:13:31,061 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:31,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:13:31,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:13:31,081 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 12:13:31,113 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 12:13:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:13:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:13:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:13:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:13:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:13:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:13:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:13:31,134 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:13:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:13:31,134 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:13:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 12:13:31,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 12:13:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 12:13:31,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 12:13:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:13:31,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:13:31,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:13:31,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:13:31,138 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 12:13:31,263 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:13:31,265 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:13:31,792 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:13:32,339 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:13:32,339 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:13:32,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:13:32 BoogieIcfgContainer [2023-08-26 12:13:32,341 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:13:32,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:13:32,343 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:13:32,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:13:32,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:13:30" (1/3) ... [2023-08-26 12:13:32,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4e35f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:13:32, skipping insertion in model container [2023-08-26 12:13:32,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (2/3) ... [2023-08-26 12:13:32,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4e35f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:13:32, skipping insertion in model container [2023-08-26 12:13:32,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:13:32" (3/3) ... [2023-08-26 12:13:32,346 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_power.opt.i [2023-08-26 12:13:32,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:13:32,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 63 error locations. [2023-08-26 12:13:32,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:13:32,446 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:13:32,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 210 transitions, 440 flow [2023-08-26 12:13:32,522 INFO L124 PetriNetUnfolderBase]: 3/206 cut-off events. [2023-08-26 12:13:32,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:13:32,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 3/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 368 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 148. Up to 2 conditions per place. [2023-08-26 12:13:32,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 210 transitions, 440 flow [2023-08-26 12:13:32,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 206 transitions, 424 flow [2023-08-26 12:13:32,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:13:32,539 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 206 transitions, 424 flow [2023-08-26 12:13:32,540 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 206 transitions, 424 flow [2023-08-26 12:13:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 206 transitions, 424 flow [2023-08-26 12:13:32,572 INFO L124 PetriNetUnfolderBase]: 3/206 cut-off events. [2023-08-26 12:13:32,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:13:32,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 3/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 364 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 148. Up to 2 conditions per place. [2023-08-26 12:13:32,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 10894 [2023-08-26 12:13:52,576 INFO L134 LiptonReduction]: Checked pairs total: 60488 [2023-08-26 12:13:52,576 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-26 12:13:52,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:13:52,588 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;@7a41609, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:13:52,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 103 error locations. [2023-08-26 12:13:52,589 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:13:52,589 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:13:52,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:13:52,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:13:52,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:13:52,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 100 more)] === [2023-08-26 12:13:52,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:13:52,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1430, now seen corresponding path program 1 times [2023-08-26 12:13:52,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:13:52,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076940963] [2023-08-26 12:13:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:13:52,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:13:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:13:52,664 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 12:13:52,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:13:52,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076940963] [2023-08-26 12:13:52,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076940963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:13:52,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:13:52,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:13:52,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656434] [2023-08-26 12:13:52,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:13:52,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:13:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:13:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:13:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:13:52,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 367 [2023-08-26 12:13:52,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 97 transitions, 206 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 12:13:52,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:13:52,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 367 [2023-08-26 12:13:52,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:51,462 INFO L124 PetriNetUnfolderBase]: 407288/524676 cut-off events. [2023-08-26 12:14:51,462 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2023-08-26 12:14:52,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050813 conditions, 524676 events. 407288/524676 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 32876. Compared 3846986 event pairs, 407288 based on Foata normal form. 6400/210397 useless extension candidates. Maximal degree in co-relation 1050801. Up to 524354 conditions per place. [2023-08-26 12:14:54,266 INFO L140 encePairwiseOnDemand]: 334/367 looper letters, 59 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2023-08-26 12:14:54,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 64 transitions, 258 flow [2023-08-26 12:14:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:14:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:14:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 382 transitions. [2023-08-26 12:14:54,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204359673024523 [2023-08-26 12:14:54,276 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 382 transitions. [2023-08-26 12:14:54,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 382 transitions. [2023-08-26 12:14:54,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:54,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 382 transitions. [2023-08-26 12:14:54,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 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 12:14:54,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 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 12:14:54,284 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 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 12:14:54,285 INFO L175 Difference]: Start difference. First operand has 109 places, 97 transitions, 206 flow. Second operand 2 states and 382 transitions. [2023-08-26 12:14:54,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 64 transitions, 258 flow [2023-08-26 12:14:54,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:14:54,323 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 136 flow [2023-08-26 12:14:54,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-08-26 12:14:54,326 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -35 predicate places. [2023-08-26 12:14:54,326 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 136 flow [2023-08-26 12:14:54,326 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 12:14:54,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:54,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:14:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:14:54,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 100 more)] === [2023-08-26 12:14:54,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:54,327 INFO L85 PathProgramCache]: Analyzing trace with hash 43807866, now seen corresponding path program 1 times [2023-08-26 12:14:54,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:54,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936792043] [2023-08-26 12:14:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:54,473 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 12:14:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936792043] [2023-08-26 12:14:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936792043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:54,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:54,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676535333] [2023-08-26 12:14:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:54,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:54,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:54,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 367 [2023-08-26 12:14:54,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 136 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 12:14:54,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:54,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 367 [2023-08-26 12:14:54,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:30,461 INFO L124 PetriNetUnfolderBase]: 280928/377721 cut-off events. [2023-08-26 12:15:30,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:15:31,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753607 conditions, 377721 events. 280928/377721 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18655. Compared 2848190 event pairs, 173228 based on Foata normal form. 0/203786 useless extension candidates. Maximal degree in co-relation 753604. Up to 221237 conditions per place. [2023-08-26 12:15:32,432 INFO L140 encePairwiseOnDemand]: 341/367 looper letters, 75 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2023-08-26 12:15:32,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 358 flow [2023-08-26 12:15:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-26 12:15:32,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410535876475931 [2023-08-26 12:15:32,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-26 12:15:32,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-26 12:15:32,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:32,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-26 12:15:32,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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 12:15:32,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 12:15:32,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 12:15:32,439 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 136 flow. Second operand 3 states and 452 transitions. [2023-08-26 12:15:32,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 358 flow [2023-08-26 12:15:32,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 88 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:15:32,441 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 240 flow [2023-08-26 12:15:32,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2023-08-26 12:15:32,441 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -34 predicate places. [2023-08-26 12:15:32,442 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 240 flow [2023-08-26 12:15:32,442 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 12:15:32,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:32,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:15:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:15:32,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 100 more)] === [2023-08-26 12:15:32,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash 43807867, now seen corresponding path program 1 times [2023-08-26 12:15:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:32,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965119644] [2023-08-26 12:15:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:32,858 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 12:15:32,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965119644] [2023-08-26 12:15:32,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965119644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:32,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:32,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:15:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689815067] [2023-08-26 12:15:32,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:32,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:15:32,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:32,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:15:32,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:15:32,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 367 [2023-08-26 12:15:32,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 240 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 12:15:32,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:32,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 367 [2023-08-26 12:15:32,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:40,565 INFO L124 PetriNetUnfolderBase]: 51962/73290 cut-off events. [2023-08-26 12:15:40,566 INFO L125 PetriNetUnfolderBase]: For 24030/24030 co-relation queries the response was YES. [2023-08-26 12:15:40,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211791 conditions, 73290 events. 51962/73290 cut-off events. For 24030/24030 co-relation queries the response was YES. Maximal size of possible extension queue 4072. Compared 513431 event pairs, 37786 based on Foata normal form. 21976/88534 useless extension candidates. Maximal degree in co-relation 211786. Up to 72374 conditions per place. [2023-08-26 12:15:40,895 INFO L140 encePairwiseOnDemand]: 352/367 looper letters, 54 selfloop transitions, 1 changer transitions 1/57 dead transitions. [2023-08-26 12:15:40,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 324 flow [2023-08-26 12:15:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-26 12:15:40,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869209809264305 [2023-08-26 12:15:40,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-26 12:15:40,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-26 12:15:40,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:40,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-26 12:15:40,917 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 12:15:40,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 12:15:40,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 12:15:40,920 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 240 flow. Second operand 3 states and 426 transitions. [2023-08-26 12:15:40,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 324 flow [2023-08-26 12:15:41,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:41,095 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 188 flow [2023-08-26 12:15:41,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-26 12:15:41,096 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -48 predicate places. [2023-08-26 12:15:41,096 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 188 flow [2023-08-26 12:15:41,096 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 12:15:41,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:41,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:41,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:15:41,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 100 more)] === [2023-08-26 12:15:41,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash 962697757, now seen corresponding path program 1 times [2023-08-26 12:15:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:41,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566947689] [2023-08-26 12:15:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:41,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:41,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:41,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566947689] [2023-08-26 12:15:41,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566947689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:41,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:41,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:15:41,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278913540] [2023-08-26 12:15:41,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:41,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:15:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:15:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:15:41,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 367 [2023-08-26 12:15:41,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:41,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:41,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 367 [2023-08-26 12:15:41,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:48,155 INFO L124 PetriNetUnfolderBase]: 50015/70762 cut-off events. [2023-08-26 12:15:48,155 INFO L125 PetriNetUnfolderBase]: For 10308/10789 co-relation queries the response was YES. [2023-08-26 12:15:48,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187466 conditions, 70762 events. 50015/70762 cut-off events. For 10308/10789 co-relation queries the response was YES. Maximal size of possible extension queue 4072. Compared 503929 event pairs, 24627 based on Foata normal form. 0/54411 useless extension candidates. Maximal degree in co-relation 187461. Up to 51375 conditions per place. [2023-08-26 12:15:48,487 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 81 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-08-26 12:15:48,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 89 transitions, 468 flow [2023-08-26 12:15:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-26 12:15:48,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45594913714804725 [2023-08-26 12:15:48,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-26 12:15:48,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-26 12:15:48,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:48,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-26 12:15:48,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 12:15:48,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 12:15:48,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 12:15:48,492 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 188 flow. Second operand 3 states and 502 transitions. [2023-08-26 12:15:48,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 89 transitions, 468 flow [2023-08-26 12:15:48,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 467 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:48,498 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 200 flow [2023-08-26 12:15:48,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-08-26 12:15:48,499 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -47 predicate places. [2023-08-26 12:15:48,499 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 200 flow [2023-08-26 12:15:48,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:48,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:48,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:48,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:15:48,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 100 more)] === [2023-08-26 12:15:48,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash 962698101, now seen corresponding path program 1 times [2023-08-26 12:15:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:48,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463597977] [2023-08-26 12:15:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:48,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:49,123 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 12:15:49,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:49,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463597977] [2023-08-26 12:15:49,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463597977] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:49,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:49,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:49,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244858170] [2023-08-26 12:15:49,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:49,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:49,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:49,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:49,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 367 [2023-08-26 12:15:49,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 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 12:15:49,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:49,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 367 [2023-08-26 12:15:49,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:56,077 INFO L124 PetriNetUnfolderBase]: 48980/69427 cut-off events. [2023-08-26 12:15:56,078 INFO L125 PetriNetUnfolderBase]: For 12970/13102 co-relation queries the response was YES. [2023-08-26 12:15:56,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189705 conditions, 69427 events. 48980/69427 cut-off events. For 12970/13102 co-relation queries the response was YES. Maximal size of possible extension queue 4026. Compared 493223 event pairs, 26721 based on Foata normal form. 0/55284 useless extension candidates. Maximal degree in co-relation 189699. Up to 64419 conditions per place. [2023-08-26 12:15:56,448 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 81 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-08-26 12:15:56,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 90 transitions, 488 flow [2023-08-26 12:15:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:56,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-26 12:15:56,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44686648501362397 [2023-08-26 12:15:56,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-26 12:15:56,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-26 12:15:56,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:56,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-26 12:15:56,452 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 12:15:56,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 12:15:56,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 12:15:56,454 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 200 flow. Second operand 3 states and 492 transitions. [2023-08-26 12:15:56,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 90 transitions, 488 flow [2023-08-26 12:15:56,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:56,459 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 230 flow [2023-08-26 12:15:56,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-08-26 12:15:56,462 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -46 predicate places. [2023-08-26 12:15:56,462 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 230 flow [2023-08-26 12:15:56,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 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 12:15:56,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:56,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:56,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:15:56,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 100 more)] === [2023-08-26 12:15:56,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash -876379776, now seen corresponding path program 1 times [2023-08-26 12:15:56,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:56,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622782229] [2023-08-26 12:15:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:56,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:56,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:56,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622782229] [2023-08-26 12:15:56,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622782229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:56,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:56,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:56,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209447423] [2023-08-26 12:15:56,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:56,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:56,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:56,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 367 [2023-08-26 12:15:56,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 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 12:15:56,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:56,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 367 [2023-08-26 12:15:56,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:10,998 INFO L124 PetriNetUnfolderBase]: 101629/142813 cut-off events. [2023-08-26 12:16:10,998 INFO L125 PetriNetUnfolderBase]: For 42111/42925 co-relation queries the response was YES. [2023-08-26 12:16:11,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400781 conditions, 142813 events. 101629/142813 cut-off events. For 42111/42925 co-relation queries the response was YES. Maximal size of possible extension queue 6774. Compared 1070852 event pairs, 24921 based on Foata normal form. 478/119873 useless extension candidates. Maximal degree in co-relation 400774. Up to 70353 conditions per place. [2023-08-26 12:16:11,830 INFO L140 encePairwiseOnDemand]: 362/367 looper letters, 128 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2023-08-26 12:16:11,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 137 transitions, 799 flow [2023-08-26 12:16:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:16:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:16:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2023-08-26 12:16:11,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45231607629427795 [2023-08-26 12:16:11,834 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2023-08-26 12:16:11,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2023-08-26 12:16:11,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:11,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2023-08-26 12:16:11,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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 12:16:11,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 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 12:16:11,838 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 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 12:16:11,838 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 230 flow. Second operand 4 states and 664 transitions. [2023-08-26 12:16:11,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 137 transitions, 799 flow [2023-08-26 12:16:11,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 137 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:16:11,853 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 267 flow [2023-08-26 12:16:11,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-08-26 12:16:11,854 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -42 predicate places. [2023-08-26 12:16:11,854 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 267 flow [2023-08-26 12:16:11,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 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 12:16:11,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:11,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:11,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:16:11,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 100 more)] === [2023-08-26 12:16:11,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash 818686248, now seen corresponding path program 1 times [2023-08-26 12:16:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:11,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957596389] [2023-08-26 12:16:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:12,137 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 12:16:12,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957596389] [2023-08-26 12:16:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957596389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:12,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:12,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:16:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921988205] [2023-08-26 12:16:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:12,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:16:12,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:16:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:16:12,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 367 [2023-08-26 12:16:12,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 117.5) internal successors, (705), 6 states have internal predecessors, (705), 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 12:16:12,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:12,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 367 [2023-08-26 12:16:12,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand