/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/13-privatized_27-multiple-protecting2_true.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:39:10,072 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:39:10,119 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 18:39:10,122 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:39:10,123 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:39:10,142 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:39:10,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:39:10,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:39:10,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:39:10,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:39:10,144 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:39:10,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:39:10,145 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:39:10,145 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:39:10,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:39:10,146 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:39:10,146 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:39:10,147 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:39:10,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:39:10,147 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:39:10,148 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:39:10,148 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:39:10,148 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:39:10,149 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:39:10,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:39:10,149 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:39:10,150 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:39:10,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:39:10,151 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:39:10,151 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:39:10,151 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:39:10,152 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:39:10,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:39:10,152 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:39:10,153 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:39:10,153 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:39:10,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:39:10,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:39:10,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:39:10,460 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:39:10,461 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:39:10,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_27-multiple-protecting2_true.i [2023-08-26 18:39:11,597 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:39:11,814 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:39:11,814 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_27-multiple-protecting2_true.i [2023-08-26 18:39:11,836 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7a54ce96/55dad127c9844e22a0780adc795ba004/FLAGb24533900 [2023-08-26 18:39:11,855 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7a54ce96/55dad127c9844e22a0780adc795ba004 [2023-08-26 18:39:11,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:39:11,863 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:39:11,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:39:11,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:39:11,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:39:11,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:39:11" (1/1) ... [2023-08-26 18:39:11,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdc20be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:11, skipping insertion in model container [2023-08-26 18:39:11,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:39:11" (1/1) ... [2023-08-26 18:39:11,924 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:39:12,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:39:12,235 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:39:12,264 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-26 18:39:12,266 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-26 18:39:12,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:39:12,328 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:39:12,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12 WrapperNode [2023-08-26 18:39:12,328 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:39:12,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:39:12,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:39:12,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:39:12,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,368 INFO L138 Inliner]: procedures = 163, calls = 53, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 116 [2023-08-26 18:39:12,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:39:12,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:39:12,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:39:12,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:39:12,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,384 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,385 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,392 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,399 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,402 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:39:12,403 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:39:12,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:39:12,403 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:39:12,404 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (1/1) ... [2023-08-26 18:39:12,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:39:12,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:39:12,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 18:39:12,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 18:39:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:39:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 18:39:12,474 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 18:39:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:39:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:39:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:39:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:39:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 18:39:12,476 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 18:39:12,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:39:12,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:39:12,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:39:12,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:39:12,477 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:39:12,625 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:39:12,626 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:39:12,905 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:39:12,916 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:39:12,916 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:39:12,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:39:12 BoogieIcfgContainer [2023-08-26 18:39:12,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:39:12,920 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:39:12,924 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:39:12,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:39:12,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:39:11" (1/3) ... [2023-08-26 18:39:12,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7390a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:39:12, skipping insertion in model container [2023-08-26 18:39:12,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:39:12" (2/3) ... [2023-08-26 18:39:12,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7390a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:39:12, skipping insertion in model container [2023-08-26 18:39:12,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:39:12" (3/3) ... [2023-08-26 18:39:12,931 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_27-multiple-protecting2_true.i [2023-08-26 18:39:12,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:39:12,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-08-26 18:39:12,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:39:13,040 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 18:39:13,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 171 transitions, 358 flow [2023-08-26 18:39:13,176 INFO L124 PetriNetUnfolderBase]: 8/169 cut-off events. [2023-08-26 18:39:13,176 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:39:13,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 8/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 212 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-08-26 18:39:13,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 171 transitions, 358 flow [2023-08-26 18:39:13,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 159 transitions, 327 flow [2023-08-26 18:39:13,193 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:39:13,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 159 transitions, 327 flow [2023-08-26 18:39:13,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 159 transitions, 327 flow [2023-08-26 18:39:13,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 159 transitions, 327 flow [2023-08-26 18:39:13,247 INFO L124 PetriNetUnfolderBase]: 8/159 cut-off events. [2023-08-26 18:39:13,248 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:39:13,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 159 events. 8/159 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 208 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-08-26 18:39:13,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 6192 [2023-08-26 18:39:17,317 INFO L134 LiptonReduction]: Checked pairs total: 17082 [2023-08-26 18:39:17,317 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-26 18:39:17,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:39:17,335 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;@78945740, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:39:17,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-26 18:39:17,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:39:17,337 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:39:17,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:39:17,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:17,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:39:17,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:17,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash 599, now seen corresponding path program 1 times [2023-08-26 18:39:17,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:17,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941747601] [2023-08-26 18:39:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:17,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:17,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941747601] [2023-08-26 18:39:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941747601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:17,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:17,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:39:17,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353880272] [2023-08-26 18:39:17,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:17,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:39:17,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:39:17,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:39:17,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 324 [2023-08-26 18:39:17,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 127 flow. Second operand has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:17,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:17,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 324 [2023-08-26 18:39:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:18,073 INFO L124 PetriNetUnfolderBase]: 3156/5112 cut-off events. [2023-08-26 18:39:18,074 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 18:39:18,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10159 conditions, 5112 events. 3156/5112 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 26688 event pairs, 3156 based on Foata normal form. 216/4646 useless extension candidates. Maximal degree in co-relation 10038. Up to 5017 conditions per place. [2023-08-26 18:39:18,109 INFO L140 encePairwiseOnDemand]: 317/324 looper letters, 45 selfloop transitions, 0 changer transitions 3/50 dead transitions. [2023-08-26 18:39:18,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 205 flow [2023-08-26 18:39:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:39:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:39:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 365 transitions. [2023-08-26 18:39:18,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632716049382716 [2023-08-26 18:39:18,126 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 365 transitions. [2023-08-26 18:39:18,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 365 transitions. [2023-08-26 18:39:18,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:18,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 365 transitions. [2023-08-26 18:39:18,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 182.5) internal successors, (365), 2 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,141 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,142 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 127 flow. Second operand 2 states and 365 transitions. [2023-08-26 18:39:18,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 205 flow [2023-08-26 18:39:18,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:39:18,151 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 98 flow [2023-08-26 18:39:18,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-08-26 18:39:18,156 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -6 predicate places. [2023-08-26 18:39:18,156 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 98 flow [2023-08-26 18:39:18,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:18,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 18:39:18,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:39:18,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:18,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:18,158 INFO L85 PathProgramCache]: Analyzing trace with hash 590008, now seen corresponding path program 1 times [2023-08-26 18:39:18,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:18,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450989917] [2023-08-26 18:39:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:18,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450989917] [2023-08-26 18:39:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450989917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:18,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:39:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195872897] [2023-08-26 18:39:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:18,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:39:18,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:39:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:39:18,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 324 [2023-08-26 18:39:18,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:18,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 324 [2023-08-26 18:39:18,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:18,693 INFO L124 PetriNetUnfolderBase]: 2760/4482 cut-off events. [2023-08-26 18:39:18,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:39:18,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8889 conditions, 4482 events. 2760/4482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 22876 event pairs, 2760 based on Foata normal form. 0/4033 useless extension candidates. Maximal degree in co-relation 8886. Up to 4387 conditions per place. [2023-08-26 18:39:18,720 INFO L140 encePairwiseOnDemand]: 321/324 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-26 18:39:18,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 180 flow [2023-08-26 18:39:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:39:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:39:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-08-26 18:39:18,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2023-08-26 18:39:18,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-08-26 18:39:18,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-08-26 18:39:18,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:18,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-08-26 18:39:18,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,730 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 98 flow. Second operand 3 states and 444 transitions. [2023-08-26 18:39:18,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 180 flow [2023-08-26 18:39:18,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:39:18,732 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 96 flow [2023-08-26 18:39:18,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-08-26 18:39:18,733 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2023-08-26 18:39:18,734 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 96 flow [2023-08-26 18:39:18,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:18,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 18:39:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:39:18,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:18,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash 590007, now seen corresponding path program 1 times [2023-08-26 18:39:18,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:18,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557071078] [2023-08-26 18:39:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:18,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:18,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:18,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557071078] [2023-08-26 18:39:18,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557071078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:18,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:18,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:39:18,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131497031] [2023-08-26 18:39:18,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:18,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:39:18,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:39:18,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:39:18,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 324 [2023-08-26 18:39:18,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:18,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:18,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 324 [2023-08-26 18:39:18,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:19,225 INFO L124 PetriNetUnfolderBase]: 2745/4449 cut-off events. [2023-08-26 18:39:19,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:39:19,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8826 conditions, 4449 events. 2745/4449 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 22717 event pairs, 2745 based on Foata normal form. 9/4017 useless extension candidates. Maximal degree in co-relation 8822. Up to 4355 conditions per place. [2023-08-26 18:39:19,245 INFO L140 encePairwiseOnDemand]: 321/324 looper letters, 38 selfloop transitions, 1 changer transitions 2/43 dead transitions. [2023-08-26 18:39:19,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 174 flow [2023-08-26 18:39:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:39:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:39:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-26 18:39:19,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2023-08-26 18:39:19,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-26 18:39:19,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-26 18:39:19,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:19,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-26 18:39:19,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,251 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 96 flow. Second operand 3 states and 448 transitions. [2023-08-26 18:39:19,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 174 flow [2023-08-26 18:39:19,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 43 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:39:19,255 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 88 flow [2023-08-26 18:39:19,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-26 18:39:19,256 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-26 18:39:19,259 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 88 flow [2023-08-26 18:39:19,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:19,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:19,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:39:19,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:19,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:19,260 INFO L85 PathProgramCache]: Analyzing trace with hash -565111168, now seen corresponding path program 1 times [2023-08-26 18:39:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:19,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786241170] [2023-08-26 18:39:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:19,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:19,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:19,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786241170] [2023-08-26 18:39:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786241170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:19,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:19,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:39:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313977576] [2023-08-26 18:39:19,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:19,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:39:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:39:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:39:19,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 324 [2023-08-26 18:39:19,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:19,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 324 [2023-08-26 18:39:19,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:19,695 INFO L124 PetriNetUnfolderBase]: 2807/4473 cut-off events. [2023-08-26 18:39:19,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:39:19,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8944 conditions, 4473 events. 2807/4473 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 23455 event pairs, 869 based on Foata normal form. 0/4149 useless extension candidates. Maximal degree in co-relation 8940. Up to 3220 conditions per place. [2023-08-26 18:39:19,719 INFO L140 encePairwiseOnDemand]: 319/324 looper letters, 65 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-26 18:39:19,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 278 flow [2023-08-26 18:39:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:39:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:39:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-26 18:39:19,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257201646090535 [2023-08-26 18:39:19,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-26 18:39:19,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-26 18:39:19,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:19,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-26 18:39:19,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,725 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 88 flow. Second operand 3 states and 511 transitions. [2023-08-26 18:39:19,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 278 flow [2023-08-26 18:39:19,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:39:19,727 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 99 flow [2023-08-26 18:39:19,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-26 18:39:19,727 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-26 18:39:19,728 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 99 flow [2023-08-26 18:39:19,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:19,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:19,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:39:19,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:19,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1566441210, now seen corresponding path program 1 times [2023-08-26 18:39:19,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:19,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128580170] [2023-08-26 18:39:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:19,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:19,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128580170] [2023-08-26 18:39:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128580170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:19,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:19,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:39:19,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037831439] [2023-08-26 18:39:19,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:19,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:39:19,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:19,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:39:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:39:19,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 324 [2023-08-26 18:39:19,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:19,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:19,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 324 [2023-08-26 18:39:19,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:20,146 INFO L124 PetriNetUnfolderBase]: 1290/2403 cut-off events. [2023-08-26 18:39:20,146 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-26 18:39:20,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5043 conditions, 2403 events. 1290/2403 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13593 event pairs, 407 based on Foata normal form. 162/2461 useless extension candidates. Maximal degree in co-relation 5038. Up to 1523 conditions per place. [2023-08-26 18:39:20,162 INFO L140 encePairwiseOnDemand]: 316/324 looper letters, 68 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2023-08-26 18:39:20,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 77 transitions, 334 flow [2023-08-26 18:39:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:39:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:39:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2023-08-26 18:39:20,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42746913580246915 [2023-08-26 18:39:20,164 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2023-08-26 18:39:20,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2023-08-26 18:39:20,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:20,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2023-08-26 18:39:20,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,169 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 99 flow. Second operand 4 states and 554 transitions. [2023-08-26 18:39:20,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 77 transitions, 334 flow [2023-08-26 18:39:20,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 77 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:39:20,178 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 138 flow [2023-08-26 18:39:20,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-26 18:39:20,180 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2023-08-26 18:39:20,180 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 138 flow [2023-08-26 18:39:20,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:20,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:20,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:39:20,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:20,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:20,182 INFO L85 PathProgramCache]: Analyzing trace with hash 700508999, now seen corresponding path program 1 times [2023-08-26 18:39:20,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:20,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987768663] [2023-08-26 18:39:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:20,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:20,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987768663] [2023-08-26 18:39:20,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987768663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:20,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:20,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:39:20,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612489964] [2023-08-26 18:39:20,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:20,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:39:20,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:20,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:39:20,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:39:20,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 324 [2023-08-26 18:39:20,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:20,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 324 [2023-08-26 18:39:20,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:20,495 INFO L124 PetriNetUnfolderBase]: 1275/2333 cut-off events. [2023-08-26 18:39:20,495 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2023-08-26 18:39:20,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5599 conditions, 2333 events. 1275/2333 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13094 event pairs, 333 based on Foata normal form. 0/2235 useless extension candidates. Maximal degree in co-relation 5593. Up to 1673 conditions per place. [2023-08-26 18:39:20,506 INFO L140 encePairwiseOnDemand]: 321/324 looper letters, 70 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-26 18:39:20,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 368 flow [2023-08-26 18:39:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:39:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:39:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-26 18:39:20,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-08-26 18:39:20,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-26 18:39:20,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-26 18:39:20,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:20,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-26 18:39:20,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,512 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 138 flow. Second operand 3 states and 513 transitions. [2023-08-26 18:39:20,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 368 flow [2023-08-26 18:39:20,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:39:20,514 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 145 flow [2023-08-26 18:39:20,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-26 18:39:20,515 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -6 predicate places. [2023-08-26 18:39:20,515 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 145 flow [2023-08-26 18:39:20,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:20,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:20,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:39:20,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:20,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 580844883, now seen corresponding path program 1 times [2023-08-26 18:39:20,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:20,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53380962] [2023-08-26 18:39:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:20,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53380962] [2023-08-26 18:39:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53380962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:20,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:39:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881944248] [2023-08-26 18:39:20,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:20,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:39:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:39:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:39:20,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 324 [2023-08-26 18:39:20,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:20,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:20,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 324 [2023-08-26 18:39:20,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:21,022 INFO L124 PetriNetUnfolderBase]: 1374/2510 cut-off events. [2023-08-26 18:39:21,023 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2023-08-26 18:39:21,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 2510 events. 1374/2510 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13821 event pairs, 745 based on Foata normal form. 53/2475 useless extension candidates. Maximal degree in co-relation 6215. Up to 1436 conditions per place. [2023-08-26 18:39:21,033 INFO L140 encePairwiseOnDemand]: 316/324 looper letters, 132 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-08-26 18:39:21,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 139 transitions, 686 flow [2023-08-26 18:39:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:39:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:39:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1006 transitions. [2023-08-26 18:39:21,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174897119341564 [2023-08-26 18:39:21,036 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1006 transitions. [2023-08-26 18:39:21,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1006 transitions. [2023-08-26 18:39:21,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:21,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1006 transitions. [2023-08-26 18:39:21,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.66666666666666) internal successors, (1006), 6 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,042 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,042 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 145 flow. Second operand 6 states and 1006 transitions. [2023-08-26 18:39:21,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 139 transitions, 686 flow [2023-08-26 18:39:21,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 139 transitions, 676 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:39:21,045 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 168 flow [2023-08-26 18:39:21,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2023-08-26 18:39:21,046 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2023-08-26 18:39:21,046 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 168 flow [2023-08-26 18:39:21,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:21,047 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 18:39:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:39:21,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:21,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1636802782, now seen corresponding path program 1 times [2023-08-26 18:39:21,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:21,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293646368] [2023-08-26 18:39:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:21,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293646368] [2023-08-26 18:39:21,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293646368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:21,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:21,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:39:21,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327643072] [2023-08-26 18:39:21,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:21,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:39:21,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:21,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:39:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:39:21,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-08-26 18:39:21,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:21,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-08-26 18:39:21,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:21,402 INFO L124 PetriNetUnfolderBase]: 1218/2565 cut-off events. [2023-08-26 18:39:21,402 INFO L125 PetriNetUnfolderBase]: For 1011/1011 co-relation queries the response was YES. [2023-08-26 18:39:21,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7165 conditions, 2565 events. 1218/2565 cut-off events. For 1011/1011 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 16437 event pairs, 517 based on Foata normal form. 303/2758 useless extension candidates. Maximal degree in co-relation 7156. Up to 1546 conditions per place. [2023-08-26 18:39:21,416 INFO L140 encePairwiseOnDemand]: 303/324 looper letters, 54 selfloop transitions, 25 changer transitions 0/80 dead transitions. [2023-08-26 18:39:21,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 454 flow [2023-08-26 18:39:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:39:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:39:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-26 18:39:21,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660493827160494 [2023-08-26 18:39:21,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-26 18:39:21,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-26 18:39:21,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:21,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-26 18:39:21,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,422 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 168 flow. Second operand 3 states and 453 transitions. [2023-08-26 18:39:21,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 454 flow [2023-08-26 18:39:21,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 425 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-26 18:39:21,431 INFO L231 Difference]: Finished difference. Result has 57 places, 63 transitions, 318 flow [2023-08-26 18:39:21,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=57, PETRI_TRANSITIONS=63} [2023-08-26 18:39:21,431 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2023-08-26 18:39:21,432 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 63 transitions, 318 flow [2023-08-26 18:39:21,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:21,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:21,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:39:21,432 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:21,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:21,433 INFO L85 PathProgramCache]: Analyzing trace with hash 161216496, now seen corresponding path program 1 times [2023-08-26 18:39:21,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:21,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890239260] [2023-08-26 18:39:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:21,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:21,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:21,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890239260] [2023-08-26 18:39:21,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890239260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:21,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:21,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:39:21,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083750034] [2023-08-26 18:39:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:21,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:39:21,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:39:21,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:39:21,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-08-26 18:39:21,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 63 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:21,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-08-26 18:39:21,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:21,791 INFO L124 PetriNetUnfolderBase]: 433/1120 cut-off events. [2023-08-26 18:39:21,792 INFO L125 PetriNetUnfolderBase]: For 706/706 co-relation queries the response was YES. [2023-08-26 18:39:21,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 1120 events. 433/1120 cut-off events. For 706/706 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6403 event pairs, 99 based on Foata normal form. 78/1172 useless extension candidates. Maximal degree in co-relation 3691. Up to 926 conditions per place. [2023-08-26 18:39:21,798 INFO L140 encePairwiseOnDemand]: 318/324 looper letters, 56 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2023-08-26 18:39:21,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 442 flow [2023-08-26 18:39:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:39:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:39:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2023-08-26 18:39:21,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38657407407407407 [2023-08-26 18:39:21,801 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 501 transitions. [2023-08-26 18:39:21,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 501 transitions. [2023-08-26 18:39:21,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:21,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 501 transitions. [2023-08-26 18:39:21,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,805 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,805 INFO L175 Difference]: Start difference. First operand has 57 places, 63 transitions, 318 flow. Second operand 4 states and 501 transitions. [2023-08-26 18:39:21,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 442 flow [2023-08-26 18:39:21,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 409 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:39:21,810 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 254 flow [2023-08-26 18:39:21,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2023-08-26 18:39:21,811 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2023-08-26 18:39:21,811 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 254 flow [2023-08-26 18:39:21,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:21,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:21,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:21,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:39:21,812 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:21,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2069729181, now seen corresponding path program 1 times [2023-08-26 18:39:21,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:21,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107994565] [2023-08-26 18:39:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:21,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:22,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:22,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107994565] [2023-08-26 18:39:22,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107994565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:22,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:22,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:39:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147168333] [2023-08-26 18:39:22,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:22,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:39:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:39:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:39:22,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-08-26 18:39:22,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:22,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-08-26 18:39:22,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:22,169 INFO L124 PetriNetUnfolderBase]: 276/799 cut-off events. [2023-08-26 18:39:22,169 INFO L125 PetriNetUnfolderBase]: For 513/517 co-relation queries the response was YES. [2023-08-26 18:39:22,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 799 events. 276/799 cut-off events. For 513/517 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4339 event pairs, 91 based on Foata normal form. 32/813 useless extension candidates. Maximal degree in co-relation 2519. Up to 569 conditions per place. [2023-08-26 18:39:22,172 INFO L140 encePairwiseOnDemand]: 319/324 looper letters, 61 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-08-26 18:39:22,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 468 flow [2023-08-26 18:39:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:39:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:39:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2023-08-26 18:39:22,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912037037037037 [2023-08-26 18:39:22,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2023-08-26 18:39:22,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2023-08-26 18:39:22,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:22,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2023-08-26 18:39:22,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.75) internal successors, (507), 4 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 18:39:22,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,178 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,179 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 254 flow. Second operand 4 states and 507 transitions. [2023-08-26 18:39:22,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 468 flow [2023-08-26 18:39:22,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 71 transitions, 440 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 18:39:22,181 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 237 flow [2023-08-26 18:39:22,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-26 18:39:22,182 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2023-08-26 18:39:22,182 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 237 flow [2023-08-26 18:39:22,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:22,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:22,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:39:22,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:22,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1619953324, now seen corresponding path program 1 times [2023-08-26 18:39:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:22,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975508048] [2023-08-26 18:39:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:22,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:22,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:22,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975508048] [2023-08-26 18:39:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975508048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:22,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:22,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:39:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082956237] [2023-08-26 18:39:22,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:22,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:39:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:39:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:39:22,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 324 [2023-08-26 18:39:22,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:22,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 324 [2023-08-26 18:39:22,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:22,348 INFO L124 PetriNetUnfolderBase]: 195/604 cut-off events. [2023-08-26 18:39:22,348 INFO L125 PetriNetUnfolderBase]: For 283/285 co-relation queries the response was YES. [2023-08-26 18:39:22,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 604 events. 195/604 cut-off events. For 283/285 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2955 event pairs, 152 based on Foata normal form. 0/604 useless extension candidates. Maximal degree in co-relation 1844. Up to 580 conditions per place. [2023-08-26 18:39:22,351 INFO L140 encePairwiseOnDemand]: 322/324 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-26 18:39:22,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 317 flow [2023-08-26 18:39:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:39:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:39:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-26 18:39:22,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2023-08-26 18:39:22,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-26 18:39:22,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-26 18:39:22,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:22,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-26 18:39:22,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,356 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 237 flow. Second operand 3 states and 441 transitions. [2023-08-26 18:39:22,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 317 flow [2023-08-26 18:39:22,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:39:22,358 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 216 flow [2023-08-26 18:39:22,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-26 18:39:22,359 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2023-08-26 18:39:22,359 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 216 flow [2023-08-26 18:39:22,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:22,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:22,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:39:22,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:22,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1619953323, now seen corresponding path program 1 times [2023-08-26 18:39:22,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:22,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680784045] [2023-08-26 18:39:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:22,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:22,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:22,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680784045] [2023-08-26 18:39:22,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680784045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:22,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:22,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:39:22,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265297025] [2023-08-26 18:39:22,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:22,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:39:22,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:39:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:39:22,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-26 18:39:22,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:22,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-26 18:39:22,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:22,497 INFO L124 PetriNetUnfolderBase]: 114/406 cut-off events. [2023-08-26 18:39:22,497 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-08-26 18:39:22,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 406 events. 114/406 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1831 event pairs, 95 based on Foata normal form. 18/424 useless extension candidates. Maximal degree in co-relation 1181. Up to 392 conditions per place. [2023-08-26 18:39:22,499 INFO L140 encePairwiseOnDemand]: 322/324 looper letters, 37 selfloop transitions, 1 changer transitions 9/48 dead transitions. [2023-08-26 18:39:22,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 292 flow [2023-08-26 18:39:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:39:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:39:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-26 18:39:22,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43724279835390945 [2023-08-26 18:39:22,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-26 18:39:22,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-26 18:39:22,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:22,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-26 18:39:22,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,505 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 216 flow. Second operand 3 states and 425 transitions. [2023-08-26 18:39:22,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 292 flow [2023-08-26 18:39:22,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:39:22,506 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 166 flow [2023-08-26 18:39:22,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-08-26 18:39:22,507 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2023-08-26 18:39:22,507 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 166 flow [2023-08-26 18:39:22,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:39:22,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:22,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 18:39:22,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-26 18:39:22,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:39:22,508 INFO L85 PathProgramCache]: Analyzing trace with hash 12372807, now seen corresponding path program 1 times [2023-08-26 18:39:22,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:39:22,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892571000] [2023-08-26 18:39:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:39:22,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:39:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:39:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:39:22,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:39:22,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892571000] [2023-08-26 18:39:22,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892571000] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:39:22,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:39:22,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:39:22,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521991751] [2023-08-26 18:39:22,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:39:22,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:39:22,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:39:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:39:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:39:22,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 324 [2023-08-26 18:39:22,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 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 18:39:22,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:39:22,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 324 [2023-08-26 18:39:22,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:39:22,693 INFO L124 PetriNetUnfolderBase]: 94/310 cut-off events. [2023-08-26 18:39:22,693 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2023-08-26 18:39:22,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 310 events. 94/310 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1343 event pairs, 54 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 908. Up to 230 conditions per place. [2023-08-26 18:39:22,694 INFO L140 encePairwiseOnDemand]: 320/324 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-26 18:39:22,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 318 flow [2023-08-26 18:39:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:39:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:39:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-08-26 18:39:22,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2023-08-26 18:39:22,696 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-08-26 18:39:22,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-08-26 18:39:22,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:39:22,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-08-26 18:39:22,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:39:22,700 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 166 flow. Second operand 4 states and 636 transitions. [2023-08-26 18:39:22,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 318 flow [2023-08-26 18:39:22,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:39:22,701 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-26 18:39:22,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-26 18:39:22,702 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -14 predicate places. [2023-08-26 18:39:22,702 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-26 18:39:22,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 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 18:39:22,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2023-08-26 18:39:22,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2023-08-26 18:39:22,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2023-08-26 18:39:22,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-08-26 18:39:22,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (9 of 14 remaining) [2023-08-26 18:39:22,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONASSERT (8 of 14 remaining) [2023-08-26 18:39:22,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (7 of 14 remaining) [2023-08-26 18:39:22,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONASSERT (6 of 14 remaining) [2023-08-26 18:39:22,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2023-08-26 18:39:22,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2023-08-26 18:39:22,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2023-08-26 18:39:22,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2023-08-26 18:39:22,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 14 remaining) [2023-08-26 18:39:22,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 14 remaining) [2023-08-26 18:39:22,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:39:22,707 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:39:22,709 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:39:22,709 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:39:22,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:39:22 BasicIcfg [2023-08-26 18:39:22,711 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:39:22,712 INFO L158 Benchmark]: Toolchain (without parser) took 10849.03ms. Allocated memory was 400.6MB in the beginning and 708.8MB in the end (delta: 308.3MB). Free memory was 355.8MB in the beginning and 596.3MB in the end (delta: -240.5MB). Peak memory consumption was 70.9MB. Max. memory is 16.0GB. [2023-08-26 18:39:22,712 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 400.6MB. Free memory is still 378.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:39:22,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.64ms. Allocated memory is still 400.6MB. Free memory was 355.8MB in the beginning and 335.9MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 18:39:22,712 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.59ms. Allocated memory is still 400.6MB. Free memory was 335.9MB in the beginning and 333.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:39:22,712 INFO L158 Benchmark]: Boogie Preprocessor took 32.86ms. Allocated memory is still 400.6MB. Free memory was 332.7MB in the beginning and 331.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:39:22,713 INFO L158 Benchmark]: RCFGBuilder took 515.75ms. Allocated memory is still 400.6MB. Free memory was 331.7MB in the beginning and 311.7MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 18:39:22,713 INFO L158 Benchmark]: TraceAbstraction took 9791.02ms. Allocated memory was 400.6MB in the beginning and 708.8MB in the end (delta: 308.3MB). Free memory was 310.7MB in the beginning and 596.3MB in the end (delta: -285.6MB). Peak memory consumption was 24.8MB. Max. memory is 16.0GB. [2023-08-26 18:39:22,714 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 400.6MB. Free memory is still 378.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 462.64ms. Allocated memory is still 400.6MB. Free memory was 355.8MB in the beginning and 335.9MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.59ms. Allocated memory is still 400.6MB. Free memory was 335.9MB in the beginning and 333.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.86ms. Allocated memory is still 400.6MB. Free memory was 332.7MB in the beginning and 331.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 515.75ms. Allocated memory is still 400.6MB. Free memory was 331.7MB in the beginning and 311.7MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 9791.02ms. Allocated memory was 400.6MB in the beginning and 708.8MB in the end (delta: 308.3MB). Free memory was 310.7MB in the beginning and 596.3MB in the end (delta: -285.6MB). Peak memory consumption was 24.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 158 PlacesBefore, 61 PlacesAfterwards, 159 TransitionsBefore, 59 TransitionsAfterwards, 6192 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 89 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 153 TotalNumberOfCompositions, 17082 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5605, independent: 5175, independent conditional: 0, independent unconditional: 5175, dependent: 430, dependent conditional: 0, dependent unconditional: 430, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3127, independent: 3032, independent conditional: 0, independent unconditional: 3032, dependent: 95, dependent conditional: 0, dependent unconditional: 95, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5605, independent: 2143, independent conditional: 0, independent unconditional: 2143, dependent: 335, dependent conditional: 0, dependent unconditional: 335, unknown: 3127, unknown conditional: 0, unknown unconditional: 3127] , Statistics on independence cache: Total cache size (in pairs): 232, Positive cache size: 181, Positive conditional cache size: 0, Positive unconditional cache size: 181, Negative cache size: 51, Negative conditional cache size: 0, Negative unconditional cache size: 51, 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: 18]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 204 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.6s, OverallIterations: 13, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 426 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 426 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1096 IncrementalHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 2 mSDtfsCounter, 1096 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=318occurred in iteration=8, InterpolantAutomatonStates: 45, 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, 1.3s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 926 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:39:22,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...