/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/safe034_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:19:04,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:19:04,520 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 12:19:04,523 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:19:04,524 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:19:04,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:19:04,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:19:04,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:19:04,547 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:19:04,550 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:19:04,550 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:19:04,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:19:04,550 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:19:04,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:19:04,551 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:19:04,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:19:04,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:19:04,552 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:19:04,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:19:04,552 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:19:04,553 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:19:04,553 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:19:04,553 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:19:04,553 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:19:04,553 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:19:04,554 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:19:04,554 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:19:04,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:19:04,554 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:19:04,554 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:19:04,555 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:19:04,555 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:19:04,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:19:04,555 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:19:04,556 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:19:04,556 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:19:04,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:19:04,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:19:04,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:19:04,816 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:19:04,816 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:19:04,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe034_tso.i [2023-08-26 12:19:05,806 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:19:06,038 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:19:06,038 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe034_tso.i [2023-08-26 12:19:06,057 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/147bcd2c2/4fac3cff6b4443ed89fd0f241642bb2f/FLAG9bd8f408a [2023-08-26 12:19:06,067 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/147bcd2c2/4fac3cff6b4443ed89fd0f241642bb2f [2023-08-26 12:19:06,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:19:06,074 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:19:06,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:19:06,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:19:06,078 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:19:06,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d6195c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06, skipping insertion in model container [2023-08-26 12:19:06,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,121 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:19:06,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:19:06,371 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:19:06,395 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:19:06,397 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:19:06,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:19:06,440 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:19:06,440 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:19:06,445 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:19:06,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06 WrapperNode [2023-08-26 12:19:06,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:19:06,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:19:06,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:19:06,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:19:06,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,477 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,495 INFO L138 Inliner]: procedures = 176, calls = 58, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 12:19:06,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:19:06,496 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:19:06,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:19:06,497 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:19:06,503 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,517 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,521 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,523 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,523 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,525 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:19:06,525 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:19:06,526 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:19:06,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:19:06,526 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (1/1) ... [2023-08-26 12:19:06,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:19:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:19:06,570 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 12:19:06,595 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 12:19:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:19:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:19:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:19:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:19:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:19:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:19:06,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:19:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:19:06,628 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:19:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 12:19:06,628 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 12:19:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:19:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:19:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:19:06,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:19:06,631 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 12:19:06,718 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:19:06,719 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:19:06,853 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:19:06,858 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:19:06,858 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:19:06,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:19:06 BoogieIcfgContainer [2023-08-26 12:19:06,860 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:19:06,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:19:06,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:19:06,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:19:06,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:19:06" (1/3) ... [2023-08-26 12:19:06,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fb9c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:19:06, skipping insertion in model container [2023-08-26 12:19:06,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:06" (2/3) ... [2023-08-26 12:19:06,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fb9c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:19:06, skipping insertion in model container [2023-08-26 12:19:06,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:19:06" (3/3) ... [2023-08-26 12:19:06,866 INFO L112 eAbstractionObserver]: Analyzing ICFG safe034_tso.i [2023-08-26 12:19:06,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:19:06,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 12:19:06,879 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:19:06,943 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:19:06,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 12:19:07,055 INFO L124 PetriNetUnfolderBase]: 3/92 cut-off events. [2023-08-26 12:19:07,056 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:19:07,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 92 events. 3/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-26 12:19:07,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 12:19:07,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 78 transitions, 165 flow [2023-08-26 12:19:07,067 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:19:07,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 12:19:07,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 12:19:07,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 78 transitions, 165 flow [2023-08-26 12:19:07,106 INFO L124 PetriNetUnfolderBase]: 1/78 cut-off events. [2023-08-26 12:19:07,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:19:07,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 78 events. 1/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2023-08-26 12:19:07,108 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-26 12:19:09,089 INFO L134 LiptonReduction]: Checked pairs total: 2391 [2023-08-26 12:19:09,089 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-08-26 12:19:09,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:19:09,115 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;@170eb885, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:19:09,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 12:19:09,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:19:09,118 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:19:09,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:19:09,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:09,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:19:09,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:19:09,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:09,123 INFO L85 PathProgramCache]: Analyzing trace with hash 321, now seen corresponding path program 1 times [2023-08-26 12:19:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:09,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772079630] [2023-08-26 12:19:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:09,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:09,206 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 12:19:09,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:09,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772079630] [2023-08-26 12:19:09,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772079630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:09,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:09,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:19:09,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711120283] [2023-08-26 12:19:09,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:09,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:19:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:19:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:19:09,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 162 [2023-08-26 12:19:09,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 55 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 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 12:19:09,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:09,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 162 [2023-08-26 12:19:09,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:09,324 INFO L124 PetriNetUnfolderBase]: 164/284 cut-off events. [2023-08-26 12:19:09,324 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 12:19:09,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 284 events. 164/284 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1161 event pairs, 164 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 574. Up to 271 conditions per place. [2023-08-26 12:19:09,327 INFO L140 encePairwiseOnDemand]: 156/162 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 12:19:09,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 71 flow [2023-08-26 12:19:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:19:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:19:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2023-08-26 12:19:09,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2023-08-26 12:19:09,340 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2023-08-26 12:19:09,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2023-08-26 12:19:09,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:09,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2023-08-26 12:19:09,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 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 12:19:09,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 12:19:09,352 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 12:19:09,354 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 55 flow. Second operand 2 states and 196 transitions. [2023-08-26 12:19:09,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 71 flow [2023-08-26 12:19:09,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:19:09,357 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2023-08-26 12:19:09,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-26 12:19:09,361 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -8 predicate places. [2023-08-26 12:19:09,361 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2023-08-26 12:19:09,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 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 12:19:09,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:09,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:09,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:19:09,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:19:09,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash 198315384, now seen corresponding path program 1 times [2023-08-26 12:19:09,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:09,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921499874] [2023-08-26 12:19:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:09,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:09,653 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 12:19:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:09,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921499874] [2023-08-26 12:19:09,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921499874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:09,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:09,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:19:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426979621] [2023-08-26 12:19:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:09,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:19:09,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:19:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:19:09,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 162 [2023-08-26 12:19:09,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 12:19:09,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:09,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 162 [2023-08-26 12:19:09,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:09,710 INFO L124 PetriNetUnfolderBase]: 202/350 cut-off events. [2023-08-26 12:19:09,711 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:19:09,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 350 events. 202/350 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1452 event pairs, 52 based on Foata normal form. 6/355 useless extension candidates. Maximal degree in co-relation 705. Up to 296 conditions per place. [2023-08-26 12:19:09,715 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 22 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-26 12:19:09,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 114 flow [2023-08-26 12:19:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:19:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:19:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 12:19:09,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720164609053497 [2023-08-26 12:19:09,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 12:19:09,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 12:19:09,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:09,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 12:19:09,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 12:19:09,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:09,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:09,725 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 278 transitions. [2023-08-26 12:19:09,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 114 flow [2023-08-26 12:19:09,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:19:09,727 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 59 flow [2023-08-26 12:19:09,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-26 12:19:09,729 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-26 12:19:09,729 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 59 flow [2023-08-26 12:19:09,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 12:19:09,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:09,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:09,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:19:09,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:19:09,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1852808841, now seen corresponding path program 1 times [2023-08-26 12:19:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:09,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010705148] [2023-08-26 12:19:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:09,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:09,917 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 12:19:09,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:09,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010705148] [2023-08-26 12:19:09,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010705148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:09,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:09,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:19:09,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62666004] [2023-08-26 12:19:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:09,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:19:09,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:19:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:19:09,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 162 [2023-08-26 12:19:09,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 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 12:19:09,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:09,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 162 [2023-08-26 12:19:09,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:09,977 INFO L124 PetriNetUnfolderBase]: 173/314 cut-off events. [2023-08-26 12:19:09,977 INFO L125 PetriNetUnfolderBase]: For 73/77 co-relation queries the response was YES. [2023-08-26 12:19:09,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 314 events. 173/314 cut-off events. For 73/77 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1234 event pairs, 39 based on Foata normal form. 36/343 useless extension candidates. Maximal degree in co-relation 738. Up to 184 conditions per place. [2023-08-26 12:19:09,979 INFO L140 encePairwiseOnDemand]: 156/162 looper letters, 22 selfloop transitions, 4 changer transitions 15/45 dead transitions. [2023-08-26 12:19:09,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 212 flow [2023-08-26 12:19:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:19:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:19:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2023-08-26 12:19:09,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2023-08-26 12:19:09,981 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2023-08-26 12:19:09,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2023-08-26 12:19:09,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:09,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2023-08-26 12:19:09,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.8) internal successors, (444), 5 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 12:19:09,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 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 12:19:09,984 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 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 12:19:09,984 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 59 flow. Second operand 5 states and 444 transitions. [2023-08-26 12:19:09,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 212 flow [2023-08-26 12:19:09,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 45 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:19:09,985 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 92 flow [2023-08-26 12:19:09,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-26 12:19:09,986 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-08-26 12:19:09,986 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 92 flow [2023-08-26 12:19:09,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 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 12:19:09,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:09,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:19:09,990 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:19:09,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash -321949446, now seen corresponding path program 1 times [2023-08-26 12:19:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538390058] [2023-08-26 12:19:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:10,128 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 12:19:10,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538390058] [2023-08-26 12:19:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538390058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:10,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:10,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:19:10,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645771947] [2023-08-26 12:19:10,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:10,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:19:10,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:19:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:19:10,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 162 [2023-08-26 12:19:10,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 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 12:19:10,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:10,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 162 [2023-08-26 12:19:10,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:10,201 INFO L124 PetriNetUnfolderBase]: 101/200 cut-off events. [2023-08-26 12:19:10,201 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-26 12:19:10,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 200 events. 101/200 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 666 event pairs, 18 based on Foata normal form. 20/216 useless extension candidates. Maximal degree in co-relation 638. Up to 91 conditions per place. [2023-08-26 12:19:10,202 INFO L140 encePairwiseOnDemand]: 156/162 looper letters, 27 selfloop transitions, 7 changer transitions 14/52 dead transitions. [2023-08-26 12:19:10,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 304 flow [2023-08-26 12:19:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:19:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:19:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 533 transitions. [2023-08-26 12:19:10,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483539094650206 [2023-08-26 12:19:10,204 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 533 transitions. [2023-08-26 12:19:10,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 533 transitions. [2023-08-26 12:19:10,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:10,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 533 transitions. [2023-08-26 12:19:10,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 88.83333333333333) internal successors, (533), 6 states have internal predecessors, (533), 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 12:19:10,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 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 12:19:10,207 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 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 12:19:10,207 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 92 flow. Second operand 6 states and 533 transitions. [2023-08-26 12:19:10,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 304 flow [2023-08-26 12:19:10,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 298 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:19:10,209 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 142 flow [2023-08-26 12:19:10,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2023-08-26 12:19:10,210 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-26 12:19:10,210 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 142 flow [2023-08-26 12:19:10,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 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 12:19:10,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:10,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:10,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:19:10,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:19:10,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash -543082499, now seen corresponding path program 1 times [2023-08-26 12:19:10,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:10,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126755444] [2023-08-26 12:19:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:10,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:10,312 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 12:19:10,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:10,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126755444] [2023-08-26 12:19:10,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126755444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:10,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:10,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:19:10,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873682733] [2023-08-26 12:19:10,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:10,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:19:10,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:10,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:19:10,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:19:10,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 162 [2023-08-26 12:19:10,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 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 12:19:10,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:10,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 162 [2023-08-26 12:19:10,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:10,377 INFO L124 PetriNetUnfolderBase]: 66/138 cut-off events. [2023-08-26 12:19:10,377 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-08-26 12:19:10,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 138 events. 66/138 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 403 event pairs, 15 based on Foata normal form. 8/143 useless extension candidates. Maximal degree in co-relation 490. Up to 57 conditions per place. [2023-08-26 12:19:10,378 INFO L140 encePairwiseOnDemand]: 156/162 looper letters, 24 selfloop transitions, 10 changer transitions 7/45 dead transitions. [2023-08-26 12:19:10,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 306 flow [2023-08-26 12:19:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:19:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:19:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 608 transitions. [2023-08-26 12:19:10,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361552028218695 [2023-08-26 12:19:10,380 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 608 transitions. [2023-08-26 12:19:10,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 608 transitions. [2023-08-26 12:19:10,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:10,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 608 transitions. [2023-08-26 12:19:10,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.85714285714286) internal successors, (608), 7 states have internal predecessors, (608), 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 12:19:10,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:10,383 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:10,383 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 142 flow. Second operand 7 states and 608 transitions. [2023-08-26 12:19:10,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 306 flow [2023-08-26 12:19:10,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 270 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-26 12:19:10,386 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 144 flow [2023-08-26 12:19:10,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=144, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-08-26 12:19:10,386 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-08-26 12:19:10,386 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 144 flow [2023-08-26 12:19:10,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 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 12:19:10,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:10,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:10,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:19:10,387 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:19:10,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:10,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1726761320, now seen corresponding path program 1 times [2023-08-26 12:19:10,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:10,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669954153] [2023-08-26 12:19:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:10,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:10,452 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 12:19:10,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:10,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669954153] [2023-08-26 12:19:10,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669954153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:10,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:10,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:19:10,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327257994] [2023-08-26 12:19:10,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:10,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:19:10,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:19:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:19:10,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 162 [2023-08-26 12:19:10,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 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 12:19:10,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:10,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 162 [2023-08-26 12:19:10,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:10,501 INFO L124 PetriNetUnfolderBase]: 96/196 cut-off events. [2023-08-26 12:19:10,501 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2023-08-26 12:19:10,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 196 events. 96/196 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 733 event pairs, 42 based on Foata normal form. 1/196 useless extension candidates. Maximal degree in co-relation 670. Up to 88 conditions per place. [2023-08-26 12:19:10,502 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 26 selfloop transitions, 1 changer transitions 14/44 dead transitions. [2023-08-26 12:19:10,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 358 flow [2023-08-26 12:19:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:19:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:19:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-08-26 12:19:10,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524691358024691 [2023-08-26 12:19:10,503 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-08-26 12:19:10,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-08-26 12:19:10,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:10,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-08-26 12:19:10,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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 12:19:10,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 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 12:19:10,505 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 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 12:19:10,505 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 144 flow. Second operand 4 states and 358 transitions. [2023-08-26 12:19:10,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 358 flow [2023-08-26 12:19:10,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 44 transitions, 282 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-26 12:19:10,507 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 111 flow [2023-08-26 12:19:10,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2023-08-26 12:19:10,508 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-26 12:19:10,508 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 111 flow [2023-08-26 12:19:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 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 12:19:10,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:10,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:10,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:19:10,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:19:10,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1734649082, now seen corresponding path program 2 times [2023-08-26 12:19:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:10,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575418272] [2023-08-26 12:19:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:10,567 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 12:19:10,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:10,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575418272] [2023-08-26 12:19:10,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575418272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:10,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:10,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:19:10,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134531978] [2023-08-26 12:19:10,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:10,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:19:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:10,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:19:10,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:19:10,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 162 [2023-08-26 12:19:10,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:10,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:10,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 162 [2023-08-26 12:19:10,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:10,599 INFO L124 PetriNetUnfolderBase]: 82/183 cut-off events. [2023-08-26 12:19:10,599 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2023-08-26 12:19:10,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 183 events. 82/183 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 708 event pairs, 47 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 579. Up to 127 conditions per place. [2023-08-26 12:19:10,600 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 23 selfloop transitions, 2 changer transitions 9/36 dead transitions. [2023-08-26 12:19:10,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 237 flow [2023-08-26 12:19:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:19:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:19:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-26 12:19:10,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637860082304527 [2023-08-26 12:19:10,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-26 12:19:10,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-26 12:19:10,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:10,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-26 12:19:10,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 12:19:10,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:10,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:10,602 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 111 flow. Second operand 3 states and 274 transitions. [2023-08-26 12:19:10,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 237 flow [2023-08-26 12:19:10,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 234 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:19:10,604 INFO L231 Difference]: Finished difference. Result has 38 places, 23 transitions, 108 flow [2023-08-26 12:19:10,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=23} [2023-08-26 12:19:10,605 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-26 12:19:10,605 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 23 transitions, 108 flow [2023-08-26 12:19:10,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:10,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:10,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:10,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:19:10,605 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:19:10,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2129040162, now seen corresponding path program 3 times [2023-08-26 12:19:10,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:10,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918247573] [2023-08-26 12:19:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:10,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:10,668 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 12:19:10,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:10,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918247573] [2023-08-26 12:19:10,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918247573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:10,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:10,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:19:10,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870854863] [2023-08-26 12:19:10,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:10,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:19:10,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:10,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:19:10,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:19:10,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 162 [2023-08-26 12:19:10,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 23 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 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 12:19:10,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:10,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 162 [2023-08-26 12:19:10,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:10,701 INFO L124 PetriNetUnfolderBase]: 32/87 cut-off events. [2023-08-26 12:19:10,701 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-08-26 12:19:10,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 87 events. 32/87 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 252 event pairs, 6 based on Foata normal form. 1/88 useless extension candidates. Maximal degree in co-relation 295. Up to 41 conditions per place. [2023-08-26 12:19:10,701 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-26 12:19:10,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 253 flow [2023-08-26 12:19:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:19:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:19:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-08-26 12:19:10,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2023-08-26 12:19:10,702 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-08-26 12:19:10,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-08-26 12:19:10,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:10,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-08-26 12:19:10,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:10,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 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 12:19:10,704 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 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 12:19:10,704 INFO L175 Difference]: Start difference. First operand has 38 places, 23 transitions, 108 flow. Second operand 4 states and 357 transitions. [2023-08-26 12:19:10,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 253 flow [2023-08-26 12:19:10,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 236 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-26 12:19:10,705 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-26 12:19:10,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-26 12:19:10,706 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-26 12:19:10,706 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-26 12:19:10,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 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 12:19:10,708 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 12:19:10,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 12:19:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:19:10,710 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-08-26 12:19:10,712 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:19:10,712 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:19:10,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:19:10 BasicIcfg [2023-08-26 12:19:10,714 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:19:10,715 INFO L158 Benchmark]: Toolchain (without parser) took 4640.89ms. Allocated memory was 388.0MB in the beginning and 465.6MB in the end (delta: 77.6MB). Free memory was 363.7MB in the beginning and 278.1MB in the end (delta: 85.6MB). Peak memory consumption was 165.3MB. Max. memory is 16.0GB. [2023-08-26 12:19:10,715 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 388.0MB. Free memory is still 364.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:19:10,715 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.42ms. Allocated memory is still 388.0MB. Free memory was 363.2MB in the beginning and 342.2MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 12:19:10,715 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.54ms. Allocated memory is still 388.0MB. Free memory was 342.2MB in the beginning and 340.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:19:10,715 INFO L158 Benchmark]: Boogie Preprocessor took 28.66ms. Allocated memory is still 388.0MB. Free memory was 340.2MB in the beginning and 338.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:19:10,715 INFO L158 Benchmark]: RCFGBuilder took 334.49ms. Allocated memory is still 388.0MB. Free memory was 338.6MB in the beginning and 323.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 12:19:10,716 INFO L158 Benchmark]: TraceAbstraction took 3852.85ms. Allocated memory was 388.0MB in the beginning and 465.6MB in the end (delta: 77.6MB). Free memory was 322.9MB in the beginning and 278.1MB in the end (delta: 44.7MB). Peak memory consumption was 123.4MB. Max. memory is 16.0GB. [2023-08-26 12:19:10,716 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 388.0MB. Free memory is still 364.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 370.42ms. Allocated memory is still 388.0MB. Free memory was 363.2MB in the beginning and 342.2MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.54ms. Allocated memory is still 388.0MB. Free memory was 342.2MB in the beginning and 340.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.66ms. Allocated memory is still 388.0MB. Free memory was 340.2MB in the beginning and 338.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 334.49ms. Allocated memory is still 388.0MB. Free memory was 338.6MB in the beginning and 323.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 3852.85ms. Allocated memory was 388.0MB in the beginning and 465.6MB in the end (delta: 77.6MB). Free memory was 322.9MB in the beginning and 278.1MB in the end (delta: 44.7MB). Peak memory consumption was 123.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 87 PlacesBefore, 33 PlacesAfterwards, 78 TransitionsBefore, 23 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 6 FixpointIterations, 22 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 1 ChoiceCompositions, 67 TotalNumberOfCompositions, 2391 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1375, independent: 1283, independent conditional: 0, independent unconditional: 1283, dependent: 92, dependent conditional: 0, dependent unconditional: 92, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 653, independent: 624, independent conditional: 0, independent unconditional: 624, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1375, independent: 659, independent conditional: 0, independent unconditional: 659, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 653, unknown conditional: 0, unknown unconditional: 653] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 117 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 78 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 78 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 373 IncrementalHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 4 mSDtfsCounter, 373 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=5, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 214 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:19:10,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...