/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/safe021_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:16:42,912 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:16:42,985 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 12:16:42,988 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:16:42,989 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:16:43,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:16:43,012 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:16:43,012 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:16:43,013 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:16:43,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:16:43,016 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:16:43,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:16:43,017 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:16:43,018 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:16:43,018 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:16:43,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:16:43,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:16:43,019 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:16:43,019 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:16:43,019 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:16:43,020 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:16:43,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:16:43,021 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:16:43,021 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:16:43,021 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:16:43,022 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:16:43,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:16:43,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:16:43,022 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:16:43,022 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:16:43,023 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:16:43,023 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:16:43,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:16:43,024 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:16:43,024 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:16:43,024 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:16:43,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:16:43,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:16:43,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:16:43,372 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:16:43,372 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:16:43,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2023-08-26 12:16:44,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:16:44,914 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:16:44,914 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2023-08-26 12:16:44,927 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8490a36a3/f8538aec8ec24f1281fe261d439abe6a/FLAG2eefaa284 [2023-08-26 12:16:44,939 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8490a36a3/f8538aec8ec24f1281fe261d439abe6a [2023-08-26 12:16:44,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:16:44,942 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:16:44,943 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:16:44,943 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:16:44,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:16:44,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:16:44" (1/1) ... [2023-08-26 12:16:44,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4edc13a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:44, skipping insertion in model container [2023-08-26 12:16:44,947 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:16:44" (1/1) ... [2023-08-26 12:16:44,990 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:16:45,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:16:45,250 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:16:45,283 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:16:45,284 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:16:45,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:16:45,332 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:16:45,333 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:16:45,339 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:16:45,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45 WrapperNode [2023-08-26 12:16:45,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:16:45,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:16:45,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:16:45,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:16:45,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,400 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 12:16:45,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:16:45,402 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:16:45,402 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:16:45,402 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:16:45,410 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,432 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,434 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,436 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:16:45,439 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:16:45,439 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:16:45,439 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:16:45,439 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (1/1) ... [2023-08-26 12:16:45,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:16:45,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:16:45,482 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 12:16:45,493 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 12:16:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:16:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:16:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:16:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:16:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:16:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:16:45,520 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:16:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:16:45,520 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:16:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 12:16:45,520 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 12:16:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:16:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:16:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:16:45,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:16:45,523 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 12:16:45,675 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:16:45,677 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:16:45,841 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:16:45,847 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:16:45,847 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:16:45,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:16:45 BoogieIcfgContainer [2023-08-26 12:16:45,849 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:16:45,851 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:16:45,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:16:45,854 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:16:45,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:16:44" (1/3) ... [2023-08-26 12:16:45,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f17e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:16:45, skipping insertion in model container [2023-08-26 12:16:45,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:16:45" (2/3) ... [2023-08-26 12:16:45,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f17e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:16:45, skipping insertion in model container [2023-08-26 12:16:45,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:16:45" (3/3) ... [2023-08-26 12:16:45,856 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_tso.i [2023-08-26 12:16:45,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:16:45,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 12:16:45,871 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:16:45,934 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:16:45,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 12:16:46,028 INFO L124 PetriNetUnfolderBase]: 3/92 cut-off events. [2023-08-26 12:16:46,029 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:16:46,033 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 12:16:46,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 12:16:46,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 78 transitions, 165 flow [2023-08-26 12:16:46,040 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:16:46,048 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 12:16:46,050 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 12:16:46,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 78 transitions, 165 flow [2023-08-26 12:16:46,068 INFO L124 PetriNetUnfolderBase]: 1/78 cut-off events. [2023-08-26 12:16:46,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:16:46,068 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 12:16:46,070 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-26 12:16:48,257 INFO L134 LiptonReduction]: Checked pairs total: 2218 [2023-08-26 12:16:48,258 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-26 12:16:48,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:16:48,276 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;@74a9d26c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:16:48,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 12:16:48,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:16:48,279 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:16:48,279 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:16:48,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:48,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:16:48,280 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 12:16:48,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:48,285 INFO L85 PathProgramCache]: Analyzing trace with hash 328, now seen corresponding path program 1 times [2023-08-26 12:16:48,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867817094] [2023-08-26 12:16:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:48,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:48,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867817094] [2023-08-26 12:16:48,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867817094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:48,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:48,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:16:48,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724655032] [2023-08-26 12:16:48,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:48,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:16:48,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:48,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:16:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:16:48,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 169 [2023-08-26 12:16:48,420 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 12:16:48,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:48,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 169 [2023-08-26 12:16:48,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:48,544 INFO L124 PetriNetUnfolderBase]: 164/293 cut-off events. [2023-08-26 12:16:48,544 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 12:16:48,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 293 events. 164/293 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1201 event pairs, 164 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 583. Up to 271 conditions per place. [2023-08-26 12:16:48,550 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 12:16:48,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 71 flow [2023-08-26 12:16:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:16:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:16:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2023-08-26 12:16:48,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5798816568047337 [2023-08-26 12:16:48,565 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2023-08-26 12:16:48,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2023-08-26 12:16:48,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:48,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2023-08-26 12:16:48,575 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 12:16:48,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:48,582 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:48,584 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 55 flow. Second operand 2 states and 196 transitions. [2023-08-26 12:16:48,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 71 flow [2023-08-26 12:16:48,587 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 12:16:48,588 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2023-08-26 12:16:48,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, 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 12:16:48,592 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -8 predicate places. [2023-08-26 12:16:48,593 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2023-08-26 12:16:48,593 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 12:16:48,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:48,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:48,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:16:48,594 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 12:16:48,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:48,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1256343265, now seen corresponding path program 1 times [2023-08-26 12:16:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:48,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091056415] [2023-08-26 12:16:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:48,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:48,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091056415] [2023-08-26 12:16:48,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091056415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:48,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:48,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:16:48,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679648229] [2023-08-26 12:16:48,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:48,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:16:48,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:16:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:16:48,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-26 12:16:48,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:48,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:48,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-26 12:16:48,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:49,006 INFO L124 PetriNetUnfolderBase]: 381/644 cut-off events. [2023-08-26 12:16:49,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:16:49,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 644 events. 381/644 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2971 event pairs, 117 based on Foata normal form. 26/670 useless extension candidates. Maximal degree in co-relation 1314. Up to 439 conditions per place. [2023-08-26 12:16:49,014 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-08-26 12:16:49,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 118 flow [2023-08-26 12:16:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:16:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:16:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-08-26 12:16:49,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285996055226825 [2023-08-26 12:16:49,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-08-26 12:16:49,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-08-26 12:16:49,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:49,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-08-26 12:16:49,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,026 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 268 transitions. [2023-08-26 12:16:49,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 118 flow [2023-08-26 12:16:49,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:16:49,029 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 78 flow [2023-08-26 12:16:49,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, 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=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-26 12:16:49,032 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2023-08-26 12:16:49,032 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 78 flow [2023-08-26 12:16:49,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:49,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:49,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:16:49,038 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 12:16:49,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 291934233, now seen corresponding path program 1 times [2023-08-26 12:16:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364519120] [2023-08-26 12:16:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:49,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:49,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364519120] [2023-08-26 12:16:49,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364519120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:49,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:49,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:16:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381160774] [2023-08-26 12:16:49,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:49,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:16:49,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:16:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:16:49,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-26 12:16:49,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:49,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-26 12:16:49,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:49,300 INFO L124 PetriNetUnfolderBase]: 359/597 cut-off events. [2023-08-26 12:16:49,300 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-08-26 12:16:49,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1576 conditions, 597 events. 359/597 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2596 event pairs, 99 based on Foata normal form. 8/601 useless extension candidates. Maximal degree in co-relation 1571. Up to 339 conditions per place. [2023-08-26 12:16:49,305 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 24 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-26 12:16:49,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 166 flow [2023-08-26 12:16:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:16:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:16:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2023-08-26 12:16:49,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162721893491125 [2023-08-26 12:16:49,307 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 349 transitions. [2023-08-26 12:16:49,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 349 transitions. [2023-08-26 12:16:49,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:49,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 349 transitions. [2023-08-26 12:16:49,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,311 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,311 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 78 flow. Second operand 4 states and 349 transitions. [2023-08-26 12:16:49,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 166 flow [2023-08-26 12:16:49,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:16:49,316 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 106 flow [2023-08-26 12:16:49,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-26 12:16:49,317 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-08-26 12:16:49,317 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 106 flow [2023-08-26 12:16:49,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:49,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:49,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:16:49,321 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 12:16:49,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 291934574, now seen corresponding path program 1 times [2023-08-26 12:16:49,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:49,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79673591] [2023-08-26 12:16:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:49,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:49,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79673591] [2023-08-26 12:16:49,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79673591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:49,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:49,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:16:49,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125680375] [2023-08-26 12:16:49,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:49,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:16:49,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:16:49,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:16:49,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-26 12:16:49,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:49,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-26 12:16:49,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:49,541 INFO L124 PetriNetUnfolderBase]: 336/575 cut-off events. [2023-08-26 12:16:49,541 INFO L125 PetriNetUnfolderBase]: For 429/429 co-relation queries the response was YES. [2023-08-26 12:16:49,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 575 events. 336/575 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2637 event pairs, 73 based on Foata normal form. 6/581 useless extension candidates. Maximal degree in co-relation 1609. Up to 360 conditions per place. [2023-08-26 12:16:49,545 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 29 selfloop transitions, 11 changer transitions 0/41 dead transitions. [2023-08-26 12:16:49,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 248 flow [2023-08-26 12:16:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:16:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:16:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-08-26 12:16:49,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281065088757396 [2023-08-26 12:16:49,547 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-08-26 12:16:49,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-08-26 12:16:49,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:49,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-08-26 12:16:49,548 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 12:16:49,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,550 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,550 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 106 flow. Second operand 4 states and 357 transitions. [2023-08-26 12:16:49,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 248 flow [2023-08-26 12:16:49,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:16:49,553 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 169 flow [2023-08-26 12:16:49,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-26 12:16:49,554 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-26 12:16:49,554 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 169 flow [2023-08-26 12:16:49,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:49,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:49,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:16:49,555 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 12:16:49,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash 460025654, now seen corresponding path program 1 times [2023-08-26 12:16:49,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:49,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479913926] [2023-08-26 12:16:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:49,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:49,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479913926] [2023-08-26 12:16:49,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479913926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:49,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:49,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:16:49,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975896062] [2023-08-26 12:16:49,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:49,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:16:49,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:16:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:16:49,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2023-08-26 12:16:49,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:49,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2023-08-26 12:16:49,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:49,786 INFO L124 PetriNetUnfolderBase]: 525/848 cut-off events. [2023-08-26 12:16:49,786 INFO L125 PetriNetUnfolderBase]: For 1266/1266 co-relation queries the response was YES. [2023-08-26 12:16:49,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2637 conditions, 848 events. 525/848 cut-off events. For 1266/1266 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3607 event pairs, 67 based on Foata normal form. 14/862 useless extension candidates. Maximal degree in co-relation 2627. Up to 329 conditions per place. [2023-08-26 12:16:49,792 INFO L140 encePairwiseOnDemand]: 162/169 looper letters, 42 selfloop transitions, 19 changer transitions 0/61 dead transitions. [2023-08-26 12:16:49,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 452 flow [2023-08-26 12:16:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:16:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:16:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 440 transitions. [2023-08-26 12:16:49,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207100591715976 [2023-08-26 12:16:49,794 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 440 transitions. [2023-08-26 12:16:49,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 440 transitions. [2023-08-26 12:16:49,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:49,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 440 transitions. [2023-08-26 12:16:49,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,798 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,798 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 169 flow. Second operand 5 states and 440 transitions. [2023-08-26 12:16:49,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 452 flow [2023-08-26 12:16:49,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 61 transitions, 450 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 12:16:49,805 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 359 flow [2023-08-26 12:16:49,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-26 12:16:49,808 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-08-26 12:16:49,808 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 359 flow [2023-08-26 12:16:49,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:49,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:49,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:16:49,809 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 12:16:49,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:49,809 INFO L85 PathProgramCache]: Analyzing trace with hash 459257474, now seen corresponding path program 2 times [2023-08-26 12:16:49,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:49,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593974338] [2023-08-26 12:16:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:49,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:49,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593974338] [2023-08-26 12:16:49,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593974338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:49,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:49,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:16:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047346256] [2023-08-26 12:16:49,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:49,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:16:49,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:49,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:16:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:16:49,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2023-08-26 12:16:49,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:49,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:49,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2023-08-26 12:16:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:50,081 INFO L124 PetriNetUnfolderBase]: 577/950 cut-off events. [2023-08-26 12:16:50,082 INFO L125 PetriNetUnfolderBase]: For 3253/3253 co-relation queries the response was YES. [2023-08-26 12:16:50,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3523 conditions, 950 events. 577/950 cut-off events. For 3253/3253 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4249 event pairs, 141 based on Foata normal form. 40/990 useless extension candidates. Maximal degree in co-relation 3509. Up to 372 conditions per place. [2023-08-26 12:16:50,087 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 30 selfloop transitions, 7 changer transitions 22/59 dead transitions. [2023-08-26 12:16:50,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 570 flow [2023-08-26 12:16:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:16:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:16:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 430 transitions. [2023-08-26 12:16:50,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088757396449705 [2023-08-26 12:16:50,089 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 430 transitions. [2023-08-26 12:16:50,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 430 transitions. [2023-08-26 12:16:50,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:50,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 430 transitions. [2023-08-26 12:16:50,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,092 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,092 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 359 flow. Second operand 5 states and 430 transitions. [2023-08-26 12:16:50,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 570 flow [2023-08-26 12:16:50,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 59 transitions, 570 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:16:50,105 INFO L231 Difference]: Finished difference. Result has 51 places, 24 transitions, 208 flow [2023-08-26 12:16:50,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=24} [2023-08-26 12:16:50,108 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-08-26 12:16:50,108 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 24 transitions, 208 flow [2023-08-26 12:16:50,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:50,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:50,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:16:50,109 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 12:16:50,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash -702977382, now seen corresponding path program 1 times [2023-08-26 12:16:50,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:50,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639371230] [2023-08-26 12:16:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:50,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:50,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639371230] [2023-08-26 12:16:50,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639371230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:50,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:16:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812705691] [2023-08-26 12:16:50,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:50,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:16:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:50,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:16:50,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:16:50,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 12:16:50,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 24 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:50,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 12:16:50,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:50,359 INFO L124 PetriNetUnfolderBase]: 172/345 cut-off events. [2023-08-26 12:16:50,359 INFO L125 PetriNetUnfolderBase]: For 1882/1961 co-relation queries the response was YES. [2023-08-26 12:16:50,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1281 conditions, 345 events. 172/345 cut-off events. For 1882/1961 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1600 event pairs, 45 based on Foata normal form. 26/357 useless extension candidates. Maximal degree in co-relation 1264. Up to 211 conditions per place. [2023-08-26 12:16:50,362 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 30 selfloop transitions, 7 changer transitions 6/51 dead transitions. [2023-08-26 12:16:50,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 469 flow [2023-08-26 12:16:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:16:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:16:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2023-08-26 12:16:50,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254437869822485 [2023-08-26 12:16:50,363 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2023-08-26 12:16:50,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2023-08-26 12:16:50,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:50,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2023-08-26 12:16:50,365 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 12:16:50,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,366 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,367 INFO L175 Difference]: Start difference. First operand has 51 places, 24 transitions, 208 flow. Second operand 5 states and 444 transitions. [2023-08-26 12:16:50,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 469 flow [2023-08-26 12:16:50,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 323 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-08-26 12:16:50,370 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 175 flow [2023-08-26 12:16:50,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2023-08-26 12:16:50,371 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2023-08-26 12:16:50,371 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 175 flow [2023-08-26 12:16:50,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:50,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:50,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:16:50,372 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 12:16:50,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1788550962, now seen corresponding path program 1 times [2023-08-26 12:16:50,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:50,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84706507] [2023-08-26 12:16:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:50,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:50,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:50,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84706507] [2023-08-26 12:16:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84706507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:50,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:50,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:16:50,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515503729] [2023-08-26 12:16:50,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:16:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:50,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:16:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:16:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 12:16:50,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:50,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 12:16:50,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:50,548 INFO L124 PetriNetUnfolderBase]: 144/310 cut-off events. [2023-08-26 12:16:50,549 INFO L125 PetriNetUnfolderBase]: For 643/729 co-relation queries the response was YES. [2023-08-26 12:16:50,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 310 events. 144/310 cut-off events. For 643/729 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1472 event pairs, 18 based on Foata normal form. 55/355 useless extension candidates. Maximal degree in co-relation 1171. Up to 160 conditions per place. [2023-08-26 12:16:50,551 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 33 selfloop transitions, 13 changer transitions 11/65 dead transitions. [2023-08-26 12:16:50,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 489 flow [2023-08-26 12:16:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:16:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:16:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 618 transitions. [2023-08-26 12:16:50,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224006762468301 [2023-08-26 12:16:50,553 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 618 transitions. [2023-08-26 12:16:50,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 618 transitions. [2023-08-26 12:16:50,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:50,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 618 transitions. [2023-08-26 12:16:50,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,557 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,557 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 175 flow. Second operand 7 states and 618 transitions. [2023-08-26 12:16:50,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 489 flow [2023-08-26 12:16:50,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:16:50,560 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 259 flow [2023-08-26 12:16:50,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2023-08-26 12:16:50,560 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 19 predicate places. [2023-08-26 12:16:50,560 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 259 flow [2023-08-26 12:16:50,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:50,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:50,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:16:50,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:16:50,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:50,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1689330634, now seen corresponding path program 1 times [2023-08-26 12:16:50,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:50,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608080377] [2023-08-26 12:16:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:50,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:50,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:50,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608080377] [2023-08-26 12:16:50,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608080377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:50,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:50,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:16:50,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066795320] [2023-08-26 12:16:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:50,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:16:50,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:16:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:16:50,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 12:16:50,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 259 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 12:16:50,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:50,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 12:16:50,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:50,758 INFO L124 PetriNetUnfolderBase]: 123/278 cut-off events. [2023-08-26 12:16:50,758 INFO L125 PetriNetUnfolderBase]: For 1003/1123 co-relation queries the response was YES. [2023-08-26 12:16:50,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 278 events. 123/278 cut-off events. For 1003/1123 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1335 event pairs, 14 based on Foata normal form. 61/330 useless extension candidates. Maximal degree in co-relation 1234. Up to 138 conditions per place. [2023-08-26 12:16:50,761 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 29 selfloop transitions, 17 changer transitions 11/65 dead transitions. [2023-08-26 12:16:50,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 547 flow [2023-08-26 12:16:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:16:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:16:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 780 transitions. [2023-08-26 12:16:50,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2023-08-26 12:16:50,763 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 780 transitions. [2023-08-26 12:16:50,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 780 transitions. [2023-08-26 12:16:50,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:50,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 780 transitions. [2023-08-26 12:16:50,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.66666666666667) internal successors, (780), 9 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,768 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,768 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 259 flow. Second operand 9 states and 780 transitions. [2023-08-26 12:16:50,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 547 flow [2023-08-26 12:16:50,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 517 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-26 12:16:50,773 INFO L231 Difference]: Finished difference. Result has 61 places, 37 transitions, 285 flow [2023-08-26 12:16:50,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=285, PETRI_PLACES=61, PETRI_TRANSITIONS=37} [2023-08-26 12:16:50,774 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2023-08-26 12:16:50,774 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 37 transitions, 285 flow [2023-08-26 12:16:50,774 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 12:16:50,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:50,775 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 12:16:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:16:50,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:16:50,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash -580326918, now seen corresponding path program 1 times [2023-08-26 12:16:50,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:50,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580594150] [2023-08-26 12:16:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:50,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:16:50,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:50,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580594150] [2023-08-26 12:16:50,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580594150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:50,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:50,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:16:50,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290563210] [2023-08-26 12:16:50,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:50,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:16:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:16:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:16:50,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 169 [2023-08-26 12:16:50,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 37 transitions, 285 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 12:16:50,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:50,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 169 [2023-08-26 12:16:50,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:50,936 INFO L124 PetriNetUnfolderBase]: 166/386 cut-off events. [2023-08-26 12:16:50,936 INFO L125 PetriNetUnfolderBase]: For 1447/1455 co-relation queries the response was YES. [2023-08-26 12:16:50,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1738 conditions, 386 events. 166/386 cut-off events. For 1447/1455 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2014 event pairs, 28 based on Foata normal form. 1/385 useless extension candidates. Maximal degree in co-relation 1720. Up to 211 conditions per place. [2023-08-26 12:16:50,938 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 0 selfloop transitions, 0 changer transitions 69/69 dead transitions. [2023-08-26 12:16:50,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 655 flow [2023-08-26 12:16:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:16:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:16:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 361 transitions. [2023-08-26 12:16:50,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340236686390533 [2023-08-26 12:16:50,940 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 361 transitions. [2023-08-26 12:16:50,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 361 transitions. [2023-08-26 12:16:50,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:50,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 361 transitions. [2023-08-26 12:16:50,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:50,943 INFO L175 Difference]: Start difference. First operand has 61 places, 37 transitions, 285 flow. Second operand 4 states and 361 transitions. [2023-08-26 12:16:50,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 655 flow [2023-08-26 12:16:50,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 492 flow, removed 26 selfloop flow, removed 12 redundant places. [2023-08-26 12:16:50,950 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-26 12:16:50,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-26 12:16:50,951 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2023-08-26 12:16:50,951 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-26 12:16:50,952 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 12:16:50,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 12:16:50,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 12:16:50,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 12:16:50,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 12:16:50,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 12:16:50,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 12:16:50,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 12:16:50,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 12:16:50,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 12:16:50,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 12:16:50,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:16:50,955 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:50,958 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:16:50,959 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:16:50,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:16:50 BasicIcfg [2023-08-26 12:16:50,963 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:16:50,964 INFO L158 Benchmark]: Toolchain (without parser) took 6021.64ms. Allocated memory was 373.3MB in the beginning and 482.3MB in the end (delta: 109.1MB). Free memory was 348.1MB in the beginning and 284.3MB in the end (delta: 63.9MB). Peak memory consumption was 172.4MB. Max. memory is 16.0GB. [2023-08-26 12:16:50,964 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 373.3MB. Free memory is still 349.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:16:50,964 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.20ms. Allocated memory is still 373.3MB. Free memory was 348.1MB in the beginning and 327.8MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 12:16:50,965 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.13ms. Allocated memory is still 373.3MB. Free memory was 327.8MB in the beginning and 326.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:16:50,965 INFO L158 Benchmark]: Boogie Preprocessor took 35.91ms. Allocated memory is still 373.3MB. Free memory was 325.6MB in the beginning and 324.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:16:50,965 INFO L158 Benchmark]: RCFGBuilder took 410.90ms. Allocated memory is still 373.3MB. Free memory was 324.1MB in the beginning and 309.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 12:16:50,967 INFO L158 Benchmark]: TraceAbstraction took 5111.90ms. Allocated memory was 373.3MB in the beginning and 482.3MB in the end (delta: 109.1MB). Free memory was 308.9MB in the beginning and 284.3MB in the end (delta: 24.6MB). Peak memory consumption was 134.6MB. Max. memory is 16.0GB. [2023-08-26 12:16:50,968 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 373.3MB. Free memory is still 349.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 397.20ms. Allocated memory is still 373.3MB. Free memory was 348.1MB in the beginning and 327.8MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 60.13ms. Allocated memory is still 373.3MB. Free memory was 327.8MB in the beginning and 326.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.91ms. Allocated memory is still 373.3MB. Free memory was 325.6MB in the beginning and 324.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 410.90ms. Allocated memory is still 373.3MB. Free memory was 324.1MB in the beginning and 309.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5111.90ms. Allocated memory was 373.3MB in the beginning and 482.3MB in the end (delta: 109.1MB). Free memory was 308.9MB in the beginning and 284.3MB in the end (delta: 24.6MB). Peak memory consumption was 134.6MB. 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: 2.2s, 87 PlacesBefore, 33 PlacesAfterwards, 78 TransitionsBefore, 23 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 5 FixpointIterations, 30 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 74 TotalNumberOfCompositions, 2218 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1270, independent: 1191, independent conditional: 0, independent unconditional: 1191, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 638, independent: 609, independent conditional: 0, independent unconditional: 609, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1270, independent: 582, independent conditional: 0, independent unconditional: 582, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 638, unknown conditional: 0, unknown unconditional: 638] , Statistics on independence cache: Total cache size (in pairs): 55, Positive cache size: 47, Positive conditional cache size: 0, Positive unconditional cache size: 47, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, 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: 5.0s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 171 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 171 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 469 IncrementalHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 16 mSDtfsCounter, 469 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=5, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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 12:16:50,989 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...