/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:11:22,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:11:22,284 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 13:11:22,289 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:11:22,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:11:22,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:11:22,321 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:11:22,325 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:11:22,326 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:11:22,331 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:11:22,331 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:11:22,331 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:11:22,331 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:11:22,332 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:11:22,332 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:11:22,332 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:11:22,333 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:11:22,333 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:11:22,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:11:22,333 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:11:22,333 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:11:22,335 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:11:22,335 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:11:22,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:11:22,336 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:11:22,336 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:11:22,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:11:22,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:11:22,337 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:11:22,337 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:11:22,338 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:11:22,338 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:11:22,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:11:22,338 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:11:22,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:11:22,339 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:11:22,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:11:22,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:11:22,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:11:22,647 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:11:22,647 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:11:22,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c [2023-08-26 13:11:23,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:11:24,049 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:11:24,050 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c [2023-08-26 13:11:24,067 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365998bbf/306782b544014974b0e97c1fbe6ecf9b/FLAG059c0d17f [2023-08-26 13:11:24,082 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365998bbf/306782b544014974b0e97c1fbe6ecf9b [2023-08-26 13:11:24,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:11:24,088 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:11:24,088 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:11:24,089 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:11:24,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:11:24,092 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184a8632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24, skipping insertion in model container [2023-08-26 13:11:24,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,125 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:11:24,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:11:24,323 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:11:24,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:11:24,364 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:11:24,364 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:11:24,373 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:11:24,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24 WrapperNode [2023-08-26 13:11:24,374 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:11:24,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:11:24,375 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:11:24,375 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:11:24,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,395 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,422 INFO L138 Inliner]: procedures = 22, calls = 111, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 267 [2023-08-26 13:11:24,423 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:11:24,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:11:24,423 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:11:24,423 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:11:24,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,449 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:11:24,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:11:24,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:11:24,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:11:24,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (1/1) ... [2023-08-26 13:11:24,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:11:24,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:24,502 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 13:11:24,524 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 13:11:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:11:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:11:24,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:11:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:11:24,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:11:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:11:24,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:11:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:11:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:11:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:11:24,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:11:24,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:11:24,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:11:24,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:11:24,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:11:24,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:11:24,537 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 13:11:24,617 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:11:24,620 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:11:25,011 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:11:25,124 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:11:25,124 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:11:25,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:11:25 BoogieIcfgContainer [2023-08-26 13:11:25,127 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:11:25,130 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:11:25,130 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:11:25,132 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:11:25,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:11:24" (1/3) ... [2023-08-26 13:11:25,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f23ba43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:11:25, skipping insertion in model container [2023-08-26 13:11:25,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:24" (2/3) ... [2023-08-26 13:11:25,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f23ba43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:11:25, skipping insertion in model container [2023-08-26 13:11:25,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:11:25" (3/3) ... [2023-08-26 13:11:25,146 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-3.wvr.c [2023-08-26 13:11:25,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:11:25,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:11:25,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:11:25,228 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:11:25,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 360 flow [2023-08-26 13:11:25,307 INFO L124 PetriNetUnfolderBase]: 2/165 cut-off events. [2023-08-26 13:11:25,308 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:11:25,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 2/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 118. Up to 2 conditions per place. [2023-08-26 13:11:25,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 360 flow [2023-08-26 13:11:25,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 154 transitions, 326 flow [2023-08-26 13:11:25,317 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:11:25,325 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 154 transitions, 326 flow [2023-08-26 13:11:25,327 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 154 transitions, 326 flow [2023-08-26 13:11:25,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 326 flow [2023-08-26 13:11:25,355 INFO L124 PetriNetUnfolderBase]: 2/154 cut-off events. [2023-08-26 13:11:25,355 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:11:25,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 154 events. 2/154 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 156 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 118. Up to 2 conditions per place. [2023-08-26 13:11:25,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-26 13:11:30,133 INFO L134 LiptonReduction]: Checked pairs total: 22362 [2023-08-26 13:11:30,133 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-26 13:11:30,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:11:30,150 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;@492d02da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:11:30,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:11:30,152 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:11:30,152 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 13:11:30,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:11:30,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:30,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:11:30,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:30,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:30,157 INFO L85 PathProgramCache]: Analyzing trace with hash 747, now seen corresponding path program 1 times [2023-08-26 13:11:30,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:30,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237552929] [2023-08-26 13:11:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:30,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:30,233 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 13:11:30,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:30,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237552929] [2023-08-26 13:11:30,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237552929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:30,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:30,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:11:30,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507591219] [2023-08-26 13:11:30,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:30,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:11:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:11:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:11:30,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 291 [2023-08-26 13:11:30,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 140 flow. Second operand has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 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 13:11:30,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:30,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 291 [2023-08-26 13:11:30,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:30,840 INFO L124 PetriNetUnfolderBase]: 3906/6501 cut-off events. [2023-08-26 13:11:30,840 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2023-08-26 13:11:30,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12406 conditions, 6501 events. 3906/6501 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 44291 event pairs, 3906 based on Foata normal form. 0/5330 useless extension candidates. Maximal degree in co-relation 11166. Up to 5730 conditions per place. [2023-08-26 13:11:30,881 INFO L140 encePairwiseOnDemand]: 289/291 looper letters, 41 selfloop transitions, 0 changer transitions 0/59 dead transitions. [2023-08-26 13:11:30,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 218 flow [2023-08-26 13:11:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:11:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:11:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 331 transitions. [2023-08-26 13:11:30,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687285223367697 [2023-08-26 13:11:30,893 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 331 transitions. [2023-08-26 13:11:30,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 331 transitions. [2023-08-26 13:11:30,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:30,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 331 transitions. [2023-08-26 13:11:30,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 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 13:11:30,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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 13:11:30,903 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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 13:11:30,904 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 140 flow. Second operand 2 states and 331 transitions. [2023-08-26 13:11:30,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 218 flow [2023-08-26 13:11:30,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:11:30,912 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 124 flow [2023-08-26 13:11:30,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-26 13:11:30,916 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-26 13:11:30,916 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 124 flow [2023-08-26 13:11:30,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 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 13:11:30,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:30,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:11:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:11:30,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:30,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash 738705, now seen corresponding path program 1 times [2023-08-26 13:11:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:30,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264823582] [2023-08-26 13:11:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:31,178 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 13:11:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:31,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264823582] [2023-08-26 13:11:31,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264823582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:31,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:31,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:11:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837574825] [2023-08-26 13:11:31,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:31,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:31,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:31,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:31,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:31,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 291 [2023-08-26 13:11:31,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 13:11:31,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:31,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 291 [2023-08-26 13:11:31,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:31,674 INFO L124 PetriNetUnfolderBase]: 3816/6353 cut-off events. [2023-08-26 13:11:31,674 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 13:11:31,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11996 conditions, 6353 events. 3816/6353 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 43082 event pairs, 3816 based on Foata normal form. 0/5240 useless extension candidates. Maximal degree in co-relation 11993. Up to 5583 conditions per place. [2023-08-26 13:11:31,710 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 38 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-26 13:11:31,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 198 flow [2023-08-26 13:11:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-26 13:11:31,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662084765177549 [2023-08-26 13:11:31,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-26 13:11:31,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-26 13:11:31,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:31,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-26 13:11:31,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 13:11:31,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:31,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:31,718 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 124 flow. Second operand 3 states and 407 transitions. [2023-08-26 13:11:31,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 198 flow [2023-08-26 13:11:31,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:11:31,720 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 122 flow [2023-08-26 13:11:31,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-26 13:11:31,721 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-26 13:11:31,721 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 122 flow [2023-08-26 13:11:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 13:11:31,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:31,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:11:31,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:11:31,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:31,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash 738704, now seen corresponding path program 1 times [2023-08-26 13:11:31,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:31,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106057940] [2023-08-26 13:11:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:31,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:31,826 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 13:11:31,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:31,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106057940] [2023-08-26 13:11:31,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106057940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:31,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:31,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:11:31,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84032564] [2023-08-26 13:11:31,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:31,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 291 [2023-08-26 13:11:31,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 13:11:31,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:31,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 291 [2023-08-26 13:11:31,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:32,286 INFO L124 PetriNetUnfolderBase]: 3726/6205 cut-off events. [2023-08-26 13:11:32,286 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 13:11:32,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11704 conditions, 6205 events. 3726/6205 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 41897 event pairs, 3726 based on Foata normal form. 0/5150 useless extension candidates. Maximal degree in co-relation 11700. Up to 5437 conditions per place. [2023-08-26 13:11:32,323 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 36 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-26 13:11:32,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 192 flow [2023-08-26 13:11:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-26 13:11:32,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536082474226804 [2023-08-26 13:11:32,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-26 13:11:32,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-26 13:11:32,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:32,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-26 13:11:32,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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 13:11:32,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:32,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:32,330 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 122 flow. Second operand 3 states and 396 transitions. [2023-08-26 13:11:32,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 192 flow [2023-08-26 13:11:32,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:32,333 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 119 flow [2023-08-26 13:11:32,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-26 13:11:32,334 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -8 predicate places. [2023-08-26 13:11:32,335 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 119 flow [2023-08-26 13:11:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 13:11:32,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:32,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:11:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:11:32,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:32,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash 709915504, now seen corresponding path program 1 times [2023-08-26 13:11:32,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:32,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377683030] [2023-08-26 13:11:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:32,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:32,413 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 13:11:32,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377683030] [2023-08-26 13:11:32,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377683030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:32,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:32,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:11:32,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666840167] [2023-08-26 13:11:32,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:32,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:32,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:32,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 291 [2023-08-26 13:11:32,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 13:11:32,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:32,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 291 [2023-08-26 13:11:32,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:32,792 INFO L124 PetriNetUnfolderBase]: 3636/6039 cut-off events. [2023-08-26 13:11:32,792 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 13:11:32,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11393 conditions, 6039 events. 3636/6039 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 40678 event pairs, 3636 based on Foata normal form. 0/5049 useless extension candidates. Maximal degree in co-relation 11389. Up to 5291 conditions per place. [2023-08-26 13:11:32,818 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 34 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-26 13:11:32,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 185 flow [2023-08-26 13:11:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-26 13:11:32,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616265750286369 [2023-08-26 13:11:32,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-26 13:11:32,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-26 13:11:32,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:32,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-26 13:11:32,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 13:11:32,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:32,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:32,823 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 119 flow. Second operand 3 states and 403 transitions. [2023-08-26 13:11:32,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 185 flow [2023-08-26 13:11:32,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:32,825 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 116 flow [2023-08-26 13:11:32,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-08-26 13:11:32,825 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-08-26 13:11:32,826 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 116 flow [2023-08-26 13:11:32,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 13:11:32,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:32,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:11:32,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:11:32,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:32,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:32,827 INFO L85 PathProgramCache]: Analyzing trace with hash 709915503, now seen corresponding path program 1 times [2023-08-26 13:11:32,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:32,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723464113] [2023-08-26 13:11:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:32,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:32,857 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 13:11:32,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:32,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723464113] [2023-08-26 13:11:32,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723464113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:32,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:32,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:11:32,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460558695] [2023-08-26 13:11:32,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:32,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:32,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:32,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:32,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 291 [2023-08-26 13:11:32,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 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 13:11:32,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:32,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 291 [2023-08-26 13:11:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:33,249 INFO L124 PetriNetUnfolderBase]: 3546/5873 cut-off events. [2023-08-26 13:11:33,250 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 13:11:33,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11082 conditions, 5873 events. 3546/5873 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 39420 event pairs, 3546 based on Foata normal form. 0/4948 useless extension candidates. Maximal degree in co-relation 11078. Up to 5145 conditions per place. [2023-08-26 13:11:33,276 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 32 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-26 13:11:33,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 178 flow [2023-08-26 13:11:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-26 13:11:33,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44902634593356244 [2023-08-26 13:11:33,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-26 13:11:33,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-26 13:11:33,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:33,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-26 13:11:33,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 13:11:33,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:33,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:33,282 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 116 flow. Second operand 3 states and 392 transitions. [2023-08-26 13:11:33,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 178 flow [2023-08-26 13:11:33,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:33,285 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 113 flow [2023-08-26 13:11:33,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2023-08-26 13:11:33,288 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-08-26 13:11:33,288 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 113 flow [2023-08-26 13:11:33,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 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 13:11:33,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:33,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:33,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:11:33,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:33,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:33,289 INFO L85 PathProgramCache]: Analyzing trace with hash -670983689, now seen corresponding path program 1 times [2023-08-26 13:11:33,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:33,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882037828] [2023-08-26 13:11:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:33,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:33,443 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 13:11:33,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:33,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882037828] [2023-08-26 13:11:33,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882037828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:33,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:33,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:11:33,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325688518] [2023-08-26 13:11:33,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:33,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:11:33,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:11:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:11:33,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-26 13:11:33,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 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 13:11:33,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:33,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-26 13:11:33,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:33,748 INFO L124 PetriNetUnfolderBase]: 2664/4490 cut-off events. [2023-08-26 13:11:33,748 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 13:11:33,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8475 conditions, 4490 events. 2664/4490 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29376 event pairs, 2664 based on Foata normal form. 0/3963 useless extension candidates. Maximal degree in co-relation 8471. Up to 3920 conditions per place. [2023-08-26 13:11:33,769 INFO L140 encePairwiseOnDemand]: 289/291 looper letters, 31 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-26 13:11:33,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 175 flow [2023-08-26 13:11:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-26 13:11:33,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261168384879725 [2023-08-26 13:11:33,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-26 13:11:33,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-26 13:11:33,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:33,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-26 13:11:33,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 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 13:11:33,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:33,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:33,775 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 113 flow. Second operand 3 states and 372 transitions. [2023-08-26 13:11:33,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 175 flow [2023-08-26 13:11:33,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:33,777 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 112 flow [2023-08-26 13:11:33,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=112, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-08-26 13:11:33,779 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-08-26 13:11:33,780 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 112 flow [2023-08-26 13:11:33,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 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 13:11:33,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:33,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:33,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:11:33,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:33,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash -670983688, now seen corresponding path program 1 times [2023-08-26 13:11:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:33,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875870680] [2023-08-26 13:11:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:33,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:33,886 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 13:11:33,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:33,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875870680] [2023-08-26 13:11:33,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875870680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:33,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:33,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:11:33,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428814390] [2023-08-26 13:11:33,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:33,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:33,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:33,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:33,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:33,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 291 [2023-08-26 13:11:33,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 13:11:33,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:33,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 291 [2023-08-26 13:11:33,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:34,077 INFO L124 PetriNetUnfolderBase]: 1782/3107 cut-off events. [2023-08-26 13:11:34,078 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 13:11:34,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5868 conditions, 3107 events. 1782/3107 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19513 event pairs, 1782 based on Foata normal form. 0/2985 useless extension candidates. Maximal degree in co-relation 5864. Up to 2695 conditions per place. [2023-08-26 13:11:34,091 INFO L140 encePairwiseOnDemand]: 289/291 looper letters, 30 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-26 13:11:34,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 49 transitions, 172 flow [2023-08-26 13:11:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-26 13:11:34,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558991981672394 [2023-08-26 13:11:34,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-26 13:11:34,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-26 13:11:34,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:34,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-26 13:11:34,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 13:11:34,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:34,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:34,097 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 112 flow. Second operand 3 states and 398 transitions. [2023-08-26 13:11:34,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 49 transitions, 172 flow [2023-08-26 13:11:34,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 49 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:34,098 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 111 flow [2023-08-26 13:11:34,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-08-26 13:11:34,099 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-08-26 13:11:34,099 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 111 flow [2023-08-26 13:11:34,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 13:11:34,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:34,099 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, 1, 1, 1, 1, 1, 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 13:11:34,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:11:34,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:34,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash -378278934, now seen corresponding path program 1 times [2023-08-26 13:11:34,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:34,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827725287] [2023-08-26 13:11:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:34,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:34,519 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 13:11:34,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827725287] [2023-08-26 13:11:34,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827725287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:34,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:34,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141557063] [2023-08-26 13:11:34,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:34,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:11:34,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:11:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:11:34,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:11:34,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 111 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:11:34,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:34,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:11:34,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:35,375 INFO L124 PetriNetUnfolderBase]: 4870/7530 cut-off events. [2023-08-26 13:11:35,375 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-26 13:11:35,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 7530 events. 4870/7530 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 44502 event pairs, 1571 based on Foata normal form. 1/7472 useless extension candidates. Maximal degree in co-relation 15121. Up to 2087 conditions per place. [2023-08-26 13:11:35,411 INFO L140 encePairwiseOnDemand]: 283/291 looper letters, 157 selfloop transitions, 15 changer transitions 25/209 dead transitions. [2023-08-26 13:11:35,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 209 transitions, 851 flow [2023-08-26 13:11:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:11:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:11:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1606 transitions. [2023-08-26 13:11:35,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-08-26 13:11:35,415 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1606 transitions. [2023-08-26 13:11:35,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1606 transitions. [2023-08-26 13:11:35,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:35,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1606 transitions. [2023-08-26 13:11:35,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.0) internal successors, (1606), 11 states have internal predecessors, (1606), 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 13:11:35,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:11:35,423 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:11:35,424 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 111 flow. Second operand 11 states and 1606 transitions. [2023-08-26 13:11:35,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 209 transitions, 851 flow [2023-08-26 13:11:35,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 209 transitions, 850 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:35,427 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 202 flow [2023-08-26 13:11:35,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=202, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-26 13:11:35,428 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-26 13:11:35,428 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 202 flow [2023-08-26 13:11:35,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:11:35,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:35,428 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, 1, 1, 1, 1, 1, 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 13:11:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:11:35,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:35,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:35,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1629220308, now seen corresponding path program 2 times [2023-08-26 13:11:35,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:35,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403758230] [2023-08-26 13:11:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:35,961 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 13:11:35,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:35,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403758230] [2023-08-26 13:11:35,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403758230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:35,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:35,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:35,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524759966] [2023-08-26 13:11:35,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:35,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:35,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:35,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:11:35,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 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 13:11:35,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:35,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:11:35,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:37,391 INFO L124 PetriNetUnfolderBase]: 11407/19558 cut-off events. [2023-08-26 13:11:37,392 INFO L125 PetriNetUnfolderBase]: For 358/366 co-relation queries the response was YES. [2023-08-26 13:11:37,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39511 conditions, 19558 events. 11407/19558 cut-off events. For 358/366 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 153508 event pairs, 2698 based on Foata normal form. 202/19361 useless extension candidates. Maximal degree in co-relation 39503. Up to 7450 conditions per place. [2023-08-26 13:11:37,492 INFO L140 encePairwiseOnDemand]: 277/291 looper letters, 134 selfloop transitions, 37 changer transitions 4/203 dead transitions. [2023-08-26 13:11:37,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 203 transitions, 836 flow [2023-08-26 13:11:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:11:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:11:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1330 transitions. [2023-08-26 13:11:37,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078274150439099 [2023-08-26 13:11:37,496 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1330 transitions. [2023-08-26 13:11:37,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1330 transitions. [2023-08-26 13:11:37,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:37,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1330 transitions. [2023-08-26 13:11:37,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.77777777777777) internal successors, (1330), 9 states have internal predecessors, (1330), 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 13:11:37,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 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 13:11:37,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 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 13:11:37,503 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 202 flow. Second operand 9 states and 1330 transitions. [2023-08-26 13:11:37,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 203 transitions, 836 flow [2023-08-26 13:11:37,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 203 transitions, 834 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:37,514 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 466 flow [2023-08-26 13:11:37,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=466, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2023-08-26 13:11:37,514 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-08-26 13:11:37,515 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 466 flow [2023-08-26 13:11:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 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 13:11:37,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:37,515 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, 1, 1, 1, 1, 1, 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 13:11:37,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:11:37,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:37,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -394323216, now seen corresponding path program 3 times [2023-08-26 13:11:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:37,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848133597] [2023-08-26 13:11:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:37,632 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 13:11:37,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848133597] [2023-08-26 13:11:37,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848133597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:37,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:37,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:11:37,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421643130] [2023-08-26 13:11:37,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:37,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:37,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:37,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:37,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 291 [2023-08-26 13:11:37,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 466 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 13:11:37,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:37,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 291 [2023-08-26 13:11:37,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:38,656 INFO L124 PetriNetUnfolderBase]: 8244/14449 cut-off events. [2023-08-26 13:11:38,657 INFO L125 PetriNetUnfolderBase]: For 10212/10675 co-relation queries the response was YES. [2023-08-26 13:11:38,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37994 conditions, 14449 events. 8244/14449 cut-off events. For 10212/10675 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 111380 event pairs, 5337 based on Foata normal form. 432/14199 useless extension candidates. Maximal degree in co-relation 37979. Up to 10630 conditions per place. [2023-08-26 13:11:38,738 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 84 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-08-26 13:11:38,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 131 transitions, 762 flow [2023-08-26 13:11:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-26 13:11:38,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349369988545246 [2023-08-26 13:11:38,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-26 13:11:38,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-26 13:11:38,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:38,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-26 13:11:38,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 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 13:11:38,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:38,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:38,743 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 466 flow. Second operand 3 states and 467 transitions. [2023-08-26 13:11:38,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 131 transitions, 762 flow [2023-08-26 13:11:38,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 131 transitions, 762 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:11:38,787 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 470 flow [2023-08-26 13:11:38,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=470, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2023-08-26 13:11:38,788 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2023-08-26 13:11:38,788 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 470 flow [2023-08-26 13:11:38,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 13:11:38,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:38,789 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, 1, 1, 1, 1, 1, 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 13:11:38,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:11:38,789 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:38,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash 77804160, now seen corresponding path program 4 times [2023-08-26 13:11:38,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:38,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49328849] [2023-08-26 13:11:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:38,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:38,929 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 13:11:38,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:38,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49328849] [2023-08-26 13:11:38,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49328849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:38,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:38,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:11:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810867726] [2023-08-26 13:11:38,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:38,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:38,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:38,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 291 [2023-08-26 13:11:38,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 13:11:38,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:38,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 291 [2023-08-26 13:11:38,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:40,197 INFO L124 PetriNetUnfolderBase]: 8496/15010 cut-off events. [2023-08-26 13:11:40,197 INFO L125 PetriNetUnfolderBase]: For 11356/11897 co-relation queries the response was YES. [2023-08-26 13:11:40,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40349 conditions, 15010 events. 8496/15010 cut-off events. For 11356/11897 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 116221 event pairs, 5476 based on Foata normal form. 400/14660 useless extension candidates. Maximal degree in co-relation 40332. Up to 11054 conditions per place. [2023-08-26 13:11:40,277 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 81 selfloop transitions, 2 changer transitions 1/129 dead transitions. [2023-08-26 13:11:40,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 129 transitions, 752 flow [2023-08-26 13:11:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-26 13:11:40,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349369988545246 [2023-08-26 13:11:40,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-26 13:11:40,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-26 13:11:40,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:40,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-26 13:11:40,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 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 13:11:40,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:40,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:40,283 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 470 flow. Second operand 3 states and 467 transitions. [2023-08-26 13:11:40,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 129 transitions, 752 flow [2023-08-26 13:11:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 129 transitions, 748 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:11:40,320 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 476 flow [2023-08-26 13:11:40,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2023-08-26 13:11:40,321 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-08-26 13:11:40,321 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 476 flow [2023-08-26 13:11:40,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 13:11:40,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:40,321 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, 1, 1, 1, 1, 1, 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 13:11:40,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:11:40,322 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:40,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:40,322 INFO L85 PathProgramCache]: Analyzing trace with hash 70933454, now seen corresponding path program 5 times [2023-08-26 13:11:40,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:40,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99961712] [2023-08-26 13:11:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:40,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:40,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99961712] [2023-08-26 13:11:40,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99961712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:40,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:40,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:11:40,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865862556] [2023-08-26 13:11:40,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:40,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:40,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:40,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 291 [2023-08-26 13:11:40,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 13:11:40,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:40,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 291 [2023-08-26 13:11:40,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:41,632 INFO L124 PetriNetUnfolderBase]: 8878/16225 cut-off events. [2023-08-26 13:11:41,632 INFO L125 PetriNetUnfolderBase]: For 13118/13633 co-relation queries the response was YES. [2023-08-26 13:11:41,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43990 conditions, 16225 events. 8878/16225 cut-off events. For 13118/13633 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 132609 event pairs, 5933 based on Foata normal form. 442/15969 useless extension candidates. Maximal degree in co-relation 43972. Up to 10872 conditions per place. [2023-08-26 13:11:41,705 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 84 selfloop transitions, 2 changer transitions 1/132 dead transitions. [2023-08-26 13:11:41,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 132 transitions, 780 flow [2023-08-26 13:11:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-26 13:11:41,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349369988545246 [2023-08-26 13:11:41,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-26 13:11:41,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-26 13:11:41,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:41,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-26 13:11:41,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 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 13:11:41,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:41,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 13:11:41,710 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 476 flow. Second operand 3 states and 467 transitions. [2023-08-26 13:11:41,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 132 transitions, 780 flow [2023-08-26 13:11:41,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 132 transitions, 776 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:11:41,776 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 482 flow [2023-08-26 13:11:41,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2023-08-26 13:11:41,776 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 21 predicate places. [2023-08-26 13:11:41,776 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 482 flow [2023-08-26 13:11:41,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 13:11:41,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:41,777 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, 1, 1, 1, 1, 1, 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 13:11:41,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:11:41,777 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:41,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash 144769190, now seen corresponding path program 6 times [2023-08-26 13:11:41,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:41,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725470130] [2023-08-26 13:11:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:41,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:42,056 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 13:11:42,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:42,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725470130] [2023-08-26 13:11:42,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725470130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:42,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:42,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:42,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219366864] [2023-08-26 13:11:42,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:42,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:11:42,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:42,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:11:42,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:11:42,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:11:42,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 482 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:11:42,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:42,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:11:42,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:44,598 INFO L124 PetriNetUnfolderBase]: 16747/25770 cut-off events. [2023-08-26 13:11:44,598 INFO L125 PetriNetUnfolderBase]: For 21424/22144 co-relation queries the response was YES. [2023-08-26 13:11:44,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76663 conditions, 25770 events. 16747/25770 cut-off events. For 21424/22144 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 175273 event pairs, 5651 based on Foata normal form. 460/25795 useless extension candidates. Maximal degree in co-relation 76644. Up to 7840 conditions per place. [2023-08-26 13:11:44,728 INFO L140 encePairwiseOnDemand]: 283/291 looper letters, 243 selfloop transitions, 21 changer transitions 29/318 dead transitions. [2023-08-26 13:11:44,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 318 transitions, 1986 flow [2023-08-26 13:11:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:11:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:11:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1602 transitions. [2023-08-26 13:11:44,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004686035613871 [2023-08-26 13:11:44,733 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1602 transitions. [2023-08-26 13:11:44,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1602 transitions. [2023-08-26 13:11:44,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:44,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1602 transitions. [2023-08-26 13:11:44,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.63636363636363) internal successors, (1602), 11 states have internal predecessors, (1602), 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 13:11:44,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:11:44,741 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:11:44,741 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 482 flow. Second operand 11 states and 1602 transitions. [2023-08-26 13:11:44,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 318 transitions, 1986 flow [2023-08-26 13:11:44,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 318 transitions, 1982 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:11:44,801 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 596 flow [2023-08-26 13:11:44,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=596, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2023-08-26 13:11:44,801 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2023-08-26 13:11:44,801 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 596 flow [2023-08-26 13:11:44,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:11:44,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:44,802 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, 1, 1, 1, 1, 1, 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 13:11:44,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:11:44,802 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:44,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash 982264808, now seen corresponding path program 7 times [2023-08-26 13:11:44,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:44,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156754967] [2023-08-26 13:11:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:44,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:45,176 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 13:11:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156754967] [2023-08-26 13:11:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156754967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:45,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:11:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909305446] [2023-08-26 13:11:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:45,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:11:45,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 596 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 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 13:11:45,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:45,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:11:45,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:47,557 INFO L124 PetriNetUnfolderBase]: 13114/23167 cut-off events. [2023-08-26 13:11:47,558 INFO L125 PetriNetUnfolderBase]: For 21881/22204 co-relation queries the response was YES. [2023-08-26 13:11:47,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68077 conditions, 23167 events. 13114/23167 cut-off events. For 21881/22204 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 186749 event pairs, 6785 based on Foata normal form. 225/22677 useless extension candidates. Maximal degree in co-relation 68053. Up to 15911 conditions per place. [2023-08-26 13:11:47,681 INFO L140 encePairwiseOnDemand]: 280/291 looper letters, 133 selfloop transitions, 28 changer transitions 0/198 dead transitions. [2023-08-26 13:11:47,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 198 transitions, 1296 flow [2023-08-26 13:11:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1001 transitions. [2023-08-26 13:11:47,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49140893470790376 [2023-08-26 13:11:47,684 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1001 transitions. [2023-08-26 13:11:47,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1001 transitions. [2023-08-26 13:11:47,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:47,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1001 transitions. [2023-08-26 13:11:47,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 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 13:11:47,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 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 13:11:47,691 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 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 13:11:47,691 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 596 flow. Second operand 7 states and 1001 transitions. [2023-08-26 13:11:47,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 198 transitions, 1296 flow [2023-08-26 13:11:47,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 198 transitions, 1279 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-26 13:11:47,929 INFO L231 Difference]: Finished difference. Result has 109 places, 139 transitions, 838 flow [2023-08-26 13:11:47,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=838, PETRI_PLACES=109, PETRI_TRANSITIONS=139} [2023-08-26 13:11:47,930 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 38 predicate places. [2023-08-26 13:11:47,930 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 139 transitions, 838 flow [2023-08-26 13:11:47,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 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 13:11:47,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:47,930 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, 1, 1, 1, 1, 1, 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 13:11:47,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 13:11:47,930 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:47,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:47,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2144438734, now seen corresponding path program 8 times [2023-08-26 13:11:47,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:47,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684781969] [2023-08-26 13:11:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:47,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:48,155 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 13:11:48,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:48,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684781969] [2023-08-26 13:11:48,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684781969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:48,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:48,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:48,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764979670] [2023-08-26 13:11:48,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:48,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:11:48,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:11:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:11:48,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:11:48,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 139 transitions, 838 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:11:48,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:48,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:11:48,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:51,395 INFO L124 PetriNetUnfolderBase]: 21438/33060 cut-off events. [2023-08-26 13:11:51,395 INFO L125 PetriNetUnfolderBase]: For 45202/46999 co-relation queries the response was YES. [2023-08-26 13:11:51,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108493 conditions, 33060 events. 21438/33060 cut-off events. For 45202/46999 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 230700 event pairs, 8329 based on Foata normal form. 862/33406 useless extension candidates. Maximal degree in co-relation 108466. Up to 11891 conditions per place. [2023-08-26 13:11:51,578 INFO L140 encePairwiseOnDemand]: 283/291 looper letters, 258 selfloop transitions, 25 changer transitions 29/344 dead transitions. [2023-08-26 13:11:51,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 344 transitions, 2485 flow [2023-08-26 13:11:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:11:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:11:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1590 transitions. [2023-08-26 13:11:51,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967197750702905 [2023-08-26 13:11:51,582 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1590 transitions. [2023-08-26 13:11:51,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1590 transitions. [2023-08-26 13:11:51,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:51,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1590 transitions. [2023-08-26 13:11:51,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.54545454545453) internal successors, (1590), 11 states have internal predecessors, (1590), 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 13:11:51,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:11:51,591 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:11:51,591 INFO L175 Difference]: Start difference. First operand has 109 places, 139 transitions, 838 flow. Second operand 11 states and 1590 transitions. [2023-08-26 13:11:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 344 transitions, 2485 flow [2023-08-26 13:11:51,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 344 transitions, 2483 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 13:11:51,870 INFO L231 Difference]: Finished difference. Result has 124 places, 154 transitions, 1017 flow [2023-08-26 13:11:51,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1017, PETRI_PLACES=124, PETRI_TRANSITIONS=154} [2023-08-26 13:11:51,871 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 53 predicate places. [2023-08-26 13:11:51,871 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 154 transitions, 1017 flow [2023-08-26 13:11:51,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:11:51,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:51,872 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, 1, 1, 1, 1, 1, 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 13:11:51,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 13:11:51,872 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:51,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1858557954, now seen corresponding path program 9 times [2023-08-26 13:11:51,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:51,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009774040] [2023-08-26 13:11:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:51,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:52,353 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 13:11:52,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:52,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009774040] [2023-08-26 13:11:52,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009774040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:52,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:52,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:11:52,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655943501] [2023-08-26 13:11:52,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:52,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:11:52,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:52,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:11:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:11:52,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:11:52,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 154 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 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 13:11:52,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:52,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:11:52,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:54,726 INFO L124 PetriNetUnfolderBase]: 14448/26371 cut-off events. [2023-08-26 13:11:54,726 INFO L125 PetriNetUnfolderBase]: For 39112/39548 co-relation queries the response was YES. [2023-08-26 13:11:54,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87519 conditions, 26371 events. 14448/26371 cut-off events. For 39112/39548 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 224409 event pairs, 6195 based on Foata normal form. 148/25708 useless extension candidates. Maximal degree in co-relation 87486. Up to 20095 conditions per place. [2023-08-26 13:11:54,867 INFO L140 encePairwiseOnDemand]: 280/291 looper letters, 144 selfloop transitions, 24 changer transitions 0/220 dead transitions. [2023-08-26 13:11:54,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 220 transitions, 1658 flow [2023-08-26 13:11:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:11:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:11:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 867 transitions. [2023-08-26 13:11:54,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965635738831615 [2023-08-26 13:11:54,870 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 867 transitions. [2023-08-26 13:11:54,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 867 transitions. [2023-08-26 13:11:54,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:54,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 867 transitions. [2023-08-26 13:11:54,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.5) internal successors, (867), 6 states have internal predecessors, (867), 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 13:11:54,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 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 13:11:54,875 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 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 13:11:54,875 INFO L175 Difference]: Start difference. First operand has 124 places, 154 transitions, 1017 flow. Second operand 6 states and 867 transitions. [2023-08-26 13:11:54,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 220 transitions, 1658 flow [2023-08-26 13:11:55,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 220 transitions, 1638 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:55,149 INFO L231 Difference]: Finished difference. Result has 130 places, 177 transitions, 1254 flow [2023-08-26 13:11:55,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1254, PETRI_PLACES=130, PETRI_TRANSITIONS=177} [2023-08-26 13:11:55,149 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 59 predicate places. [2023-08-26 13:11:55,149 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 177 transitions, 1254 flow [2023-08-26 13:11:55,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 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 13:11:55,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:55,150 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, 1, 1, 1, 1, 1, 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 13:11:55,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 13:11:55,150 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:55,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:55,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1222950790, now seen corresponding path program 10 times [2023-08-26 13:11:55,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:55,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865426370] [2023-08-26 13:11:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:55,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:55,750 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 13:11:55,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:55,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865426370] [2023-08-26 13:11:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865426370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:55,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:55,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:11:55,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134665314] [2023-08-26 13:11:55,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:55,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:11:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:11:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:11:55,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:11:55,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 177 transitions, 1254 flow. Second operand has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 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 13:11:55,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:55,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:11:55,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:58,686 INFO L124 PetriNetUnfolderBase]: 16520/30247 cut-off events. [2023-08-26 13:11:58,686 INFO L125 PetriNetUnfolderBase]: For 60967/61332 co-relation queries the response was YES. [2023-08-26 13:11:58,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107189 conditions, 30247 events. 16520/30247 cut-off events. For 60967/61332 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 263679 event pairs, 6415 based on Foata normal form. 248/29854 useless extension candidates. Maximal degree in co-relation 107152. Up to 20282 conditions per place. [2023-08-26 13:11:58,883 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 180 selfloop transitions, 28 changer transitions 2/262 dead transitions. [2023-08-26 13:11:58,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 262 transitions, 2127 flow [2023-08-26 13:11:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:11:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:11:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 877 transitions. [2023-08-26 13:11:58,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502290950744559 [2023-08-26 13:11:58,885 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 877 transitions. [2023-08-26 13:11:58,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 877 transitions. [2023-08-26 13:11:58,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:58,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 877 transitions. [2023-08-26 13:11:58,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 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 13:11:58,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 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 13:11:58,889 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 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 13:11:58,889 INFO L175 Difference]: Start difference. First operand has 130 places, 177 transitions, 1254 flow. Second operand 6 states and 877 transitions. [2023-08-26 13:11:58,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 262 transitions, 2127 flow [2023-08-26 13:11:59,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 262 transitions, 2085 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-26 13:11:59,477 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 1419 flow [2023-08-26 13:11:59,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1419, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2023-08-26 13:11:59,477 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 66 predicate places. [2023-08-26 13:11:59,477 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 1419 flow [2023-08-26 13:11:59,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 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 13:11:59,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:59,478 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, 1, 1, 1, 1, 1, 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 13:11:59,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 13:11:59,478 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:59,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash 301152816, now seen corresponding path program 11 times [2023-08-26 13:11:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:59,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128070432] [2023-08-26 13:11:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:00,000 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 13:12:00,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:00,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128070432] [2023-08-26 13:12:00,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128070432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:00,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:00,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:12:00,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566919799] [2023-08-26 13:12:00,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:00,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:12:00,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:00,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:12:00,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:12:00,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:12:00,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 1419 flow. Second operand has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 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 13:12:00,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:00,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:12:00,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:03,446 INFO L124 PetriNetUnfolderBase]: 18768/33737 cut-off events. [2023-08-26 13:12:03,446 INFO L125 PetriNetUnfolderBase]: For 76330/77035 co-relation queries the response was YES. [2023-08-26 13:12:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122410 conditions, 33737 events. 18768/33737 cut-off events. For 76330/77035 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 290453 event pairs, 7895 based on Foata normal form. 372/33198 useless extension candidates. Maximal degree in co-relation 122370. Up to 13493 conditions per place. [2023-08-26 13:12:03,690 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 205 selfloop transitions, 51 changer transitions 2/310 dead transitions. [2023-08-26 13:12:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 310 transitions, 2678 flow [2023-08-26 13:12:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:12:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:12:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 892 transitions. [2023-08-26 13:12:03,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108820160366552 [2023-08-26 13:12:03,692 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 892 transitions. [2023-08-26 13:12:03,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 892 transitions. [2023-08-26 13:12:03,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:03,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 892 transitions. [2023-08-26 13:12:03,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.66666666666666) internal successors, (892), 6 states have internal predecessors, (892), 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 13:12:03,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 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 13:12:03,696 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 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 13:12:03,696 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 1419 flow. Second operand 6 states and 892 transitions. [2023-08-26 13:12:03,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 310 transitions, 2678 flow [2023-08-26 13:12:04,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 310 transitions, 2638 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-26 13:12:04,166 INFO L231 Difference]: Finished difference. Result has 143 places, 212 transitions, 1770 flow [2023-08-26 13:12:04,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1770, PETRI_PLACES=143, PETRI_TRANSITIONS=212} [2023-08-26 13:12:04,167 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 72 predicate places. [2023-08-26 13:12:04,167 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 212 transitions, 1770 flow [2023-08-26 13:12:04,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 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 13:12:04,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:04,167 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, 1, 1, 1, 1, 1, 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 13:12:04,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 13:12:04,167 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:04,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash -749460694, now seen corresponding path program 12 times [2023-08-26 13:12:04,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:04,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223928614] [2023-08-26 13:12:04,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:04,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:05,038 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 13:12:05,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:05,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223928614] [2023-08-26 13:12:05,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223928614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:05,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:05,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 13:12:05,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655463888] [2023-08-26 13:12:05,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:05,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:12:05,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:12:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:12:05,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:12:05,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 212 transitions, 1770 flow. Second operand has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 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 13:12:05,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:05,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:12:05,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:10,572 INFO L124 PetriNetUnfolderBase]: 27224/49445 cut-off events. [2023-08-26 13:12:10,573 INFO L125 PetriNetUnfolderBase]: For 147269/148603 co-relation queries the response was YES. [2023-08-26 13:12:10,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189986 conditions, 49445 events. 27224/49445 cut-off events. For 147269/148603 co-relation queries the response was YES. Maximal size of possible extension queue 1498. Compared 457253 event pairs, 11095 based on Foata normal form. 508/48681 useless extension candidates. Maximal degree in co-relation 189942. Up to 27387 conditions per place. [2023-08-26 13:12:11,319 INFO L140 encePairwiseOnDemand]: 276/291 looper letters, 274 selfloop transitions, 64 changer transitions 14/404 dead transitions. [2023-08-26 13:12:11,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 404 transitions, 3780 flow [2023-08-26 13:12:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:12:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:12:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1460 transitions. [2023-08-26 13:12:11,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-08-26 13:12:11,322 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1460 transitions. [2023-08-26 13:12:11,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1460 transitions. [2023-08-26 13:12:11,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:11,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1460 transitions. [2023-08-26 13:12:11,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.0) internal successors, (1460), 10 states have internal predecessors, (1460), 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 13:12:11,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 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 13:12:11,329 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 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 13:12:11,329 INFO L175 Difference]: Start difference. First operand has 143 places, 212 transitions, 1770 flow. Second operand 10 states and 1460 transitions. [2023-08-26 13:12:11,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 404 transitions, 3780 flow [2023-08-26 13:12:12,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 404 transitions, 3780 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:12:12,292 INFO L231 Difference]: Finished difference. Result has 160 places, 254 transitions, 2456 flow [2023-08-26 13:12:12,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2456, PETRI_PLACES=160, PETRI_TRANSITIONS=254} [2023-08-26 13:12:12,292 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 89 predicate places. [2023-08-26 13:12:12,292 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 254 transitions, 2456 flow [2023-08-26 13:12:12,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 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 13:12:12,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:12,293 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, 1, 1, 1, 1, 1, 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 13:12:12,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 13:12:12,293 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:12,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1991546796, now seen corresponding path program 13 times [2023-08-26 13:12:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:12,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872313893] [2023-08-26 13:12:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:12,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:12,695 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 13:12:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:12,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872313893] [2023-08-26 13:12:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872313893] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:12,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:12:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261545173] [2023-08-26 13:12:12,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:12,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:12:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:12:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:12:12,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:12:12,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 254 transitions, 2456 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:12:12,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:12,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:12:12,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:19,721 INFO L124 PetriNetUnfolderBase]: 28660/53813 cut-off events. [2023-08-26 13:12:19,721 INFO L125 PetriNetUnfolderBase]: For 218657/219951 co-relation queries the response was YES. [2023-08-26 13:12:20,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221152 conditions, 53813 events. 28660/53813 cut-off events. For 218657/219951 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 516635 event pairs, 9569 based on Foata normal form. 716/53684 useless extension candidates. Maximal degree in co-relation 221099. Up to 25075 conditions per place. [2023-08-26 13:12:20,260 INFO L140 encePairwiseOnDemand]: 278/291 looper letters, 283 selfloop transitions, 116 changer transitions 18/469 dead transitions. [2023-08-26 13:12:20,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 469 transitions, 4915 flow [2023-08-26 13:12:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:12:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:12:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1607 transitions. [2023-08-26 13:12:20,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020306154326772 [2023-08-26 13:12:20,263 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1607 transitions. [2023-08-26 13:12:20,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1607 transitions. [2023-08-26 13:12:20,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:20,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1607 transitions. [2023-08-26 13:12:20,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.0909090909091) internal successors, (1607), 11 states have internal predecessors, (1607), 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 13:12:20,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:12:20,269 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:12:20,270 INFO L175 Difference]: Start difference. First operand has 160 places, 254 transitions, 2456 flow. Second operand 11 states and 1607 transitions. [2023-08-26 13:12:20,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 469 transitions, 4915 flow [2023-08-26 13:12:21,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 469 transitions, 4849 flow, removed 33 selfloop flow, removed 0 redundant places. [2023-08-26 13:12:21,710 INFO L231 Difference]: Finished difference. Result has 177 places, 306 transitions, 3446 flow [2023-08-26 13:12:21,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3446, PETRI_PLACES=177, PETRI_TRANSITIONS=306} [2023-08-26 13:12:21,711 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 106 predicate places. [2023-08-26 13:12:21,711 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 306 transitions, 3446 flow [2023-08-26 13:12:21,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:12:21,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:21,711 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, 1, 1, 1, 1, 1, 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 13:12:21,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 13:12:21,712 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:21,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:21,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1571889872, now seen corresponding path program 14 times [2023-08-26 13:12:21,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301152387] [2023-08-26 13:12:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:22,457 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 13:12:22,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:22,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301152387] [2023-08-26 13:12:22,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301152387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:22,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:22,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:12:22,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405271819] [2023-08-26 13:12:22,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:22,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:12:22,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:12:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:12:22,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:12:22,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 306 transitions, 3446 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 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 13:12:22,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:22,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:12:22,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:29,447 INFO L124 PetriNetUnfolderBase]: 27940/52062 cut-off events. [2023-08-26 13:12:29,448 INFO L125 PetriNetUnfolderBase]: For 284468/287603 co-relation queries the response was YES. [2023-08-26 13:12:29,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229774 conditions, 52062 events. 27940/52062 cut-off events. For 284468/287603 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 492452 event pairs, 14961 based on Foata normal form. 200/51128 useless extension candidates. Maximal degree in co-relation 229713. Up to 43328 conditions per place. [2023-08-26 13:12:30,033 INFO L140 encePairwiseOnDemand]: 282/291 looper letters, 280 selfloop transitions, 21 changer transitions 0/353 dead transitions. [2023-08-26 13:12:30,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 353 transitions, 4421 flow [2023-08-26 13:12:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:12:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:12:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 857 transitions. [2023-08-26 13:12:30,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490836197021764 [2023-08-26 13:12:30,035 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 857 transitions. [2023-08-26 13:12:30,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 857 transitions. [2023-08-26 13:12:30,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:30,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 857 transitions. [2023-08-26 13:12:30,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 142.83333333333334) internal successors, (857), 6 states have internal predecessors, (857), 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 13:12:30,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 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 13:12:30,038 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 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 13:12:30,038 INFO L175 Difference]: Start difference. First operand has 177 places, 306 transitions, 3446 flow. Second operand 6 states and 857 transitions. [2023-08-26 13:12:30,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 353 transitions, 4421 flow [2023-08-26 13:12:32,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 353 transitions, 4271 flow, removed 75 selfloop flow, removed 0 redundant places. [2023-08-26 13:12:32,156 INFO L231 Difference]: Finished difference. Result has 183 places, 315 transitions, 3499 flow [2023-08-26 13:12:32,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=3304, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3499, PETRI_PLACES=183, PETRI_TRANSITIONS=315} [2023-08-26 13:12:32,156 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 112 predicate places. [2023-08-26 13:12:32,156 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 315 transitions, 3499 flow [2023-08-26 13:12:32,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 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 13:12:32,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:32,157 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, 1, 1, 1, 1, 1, 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 13:12:32,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 13:12:32,157 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:32,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash 836937062, now seen corresponding path program 15 times [2023-08-26 13:12:32,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:32,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883814463] [2023-08-26 13:12:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:32,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:32,469 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 13:12:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:32,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883814463] [2023-08-26 13:12:32,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883814463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:32,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:32,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:12:32,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890051119] [2023-08-26 13:12:32,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:12:32,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:12:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:12:32,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:12:32,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 315 transitions, 3499 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:12:32,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:32,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:12:32,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:43,142 INFO L124 PetriNetUnfolderBase]: 39155/73134 cut-off events. [2023-08-26 13:12:43,142 INFO L125 PetriNetUnfolderBase]: For 390839/395760 co-relation queries the response was YES. [2023-08-26 13:12:43,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315331 conditions, 73134 events. 39155/73134 cut-off events. For 390839/395760 co-relation queries the response was YES. Maximal size of possible extension queue 2176. Compared 726898 event pairs, 12604 based on Foata normal form. 1299/73076 useless extension candidates. Maximal degree in co-relation 315267. Up to 14079 conditions per place. [2023-08-26 13:12:44,079 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 405 selfloop transitions, 181 changer transitions 25/663 dead transitions. [2023-08-26 13:12:44,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 663 transitions, 8219 flow [2023-08-26 13:12:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:12:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:12:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1632 transitions. [2023-08-26 13:12:44,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098406747891284 [2023-08-26 13:12:44,082 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1632 transitions. [2023-08-26 13:12:44,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1632 transitions. [2023-08-26 13:12:44,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:44,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1632 transitions. [2023-08-26 13:12:44,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 148.36363636363637) internal successors, (1632), 11 states have internal predecessors, (1632), 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 13:12:44,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:12:44,087 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:12:44,087 INFO L175 Difference]: Start difference. First operand has 183 places, 315 transitions, 3499 flow. Second operand 11 states and 1632 transitions. [2023-08-26 13:12:44,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 663 transitions, 8219 flow [2023-08-26 13:12:46,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 663 transitions, 8102 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-08-26 13:12:46,536 INFO L231 Difference]: Finished difference. Result has 200 places, 432 transitions, 5827 flow [2023-08-26 13:12:46,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5827, PETRI_PLACES=200, PETRI_TRANSITIONS=432} [2023-08-26 13:12:46,537 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 129 predicate places. [2023-08-26 13:12:46,537 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 432 transitions, 5827 flow [2023-08-26 13:12:46,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:12:46,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:46,538 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, 1, 1, 1, 1, 1, 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 13:12:46,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 13:12:46,538 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:46,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1079018060, now seen corresponding path program 16 times [2023-08-26 13:12:46,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:46,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676022600] [2023-08-26 13:12:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:46,904 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 13:12:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676022600] [2023-08-26 13:12:46,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676022600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:46,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:46,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:12:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503854456] [2023-08-26 13:12:46,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:46,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:12:46,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:12:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:12:46,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:12:46,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 432 transitions, 5827 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:12:46,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:46,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:12:46,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:59,165 INFO L124 PetriNetUnfolderBase]: 38358/72034 cut-off events. [2023-08-26 13:12:59,166 INFO L125 PetriNetUnfolderBase]: For 545985/550407 co-relation queries the response was YES. [2023-08-26 13:13:00,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336612 conditions, 72034 events. 38358/72034 cut-off events. For 545985/550407 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 719082 event pairs, 13135 based on Foata normal form. 1482/72558 useless extension candidates. Maximal degree in co-relation 336539. Up to 16149 conditions per place. [2023-08-26 13:13:00,435 INFO L140 encePairwiseOnDemand]: 275/291 looper letters, 422 selfloop transitions, 322 changer transitions 17/813 dead transitions. [2023-08-26 13:13:00,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 813 transitions, 11863 flow [2023-08-26 13:13:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:13:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:13:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2451 transitions. [2023-08-26 13:13:00,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954517889630079 [2023-08-26 13:13:00,438 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2451 transitions. [2023-08-26 13:13:00,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2451 transitions. [2023-08-26 13:13:00,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:00,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2451 transitions. [2023-08-26 13:13:00,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 144.1764705882353) internal successors, (2451), 17 states have internal predecessors, (2451), 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 13:13:00,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 291.0) internal successors, (5238), 18 states have internal predecessors, (5238), 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 13:13:00,444 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 291.0) internal successors, (5238), 18 states have internal predecessors, (5238), 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 13:13:00,444 INFO L175 Difference]: Start difference. First operand has 200 places, 432 transitions, 5827 flow. Second operand 17 states and 2451 transitions. [2023-08-26 13:13:00,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 813 transitions, 11863 flow [2023-08-26 13:13:04,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 813 transitions, 11690 flow, removed 86 selfloop flow, removed 1 redundant places. [2023-08-26 13:13:04,158 INFO L231 Difference]: Finished difference. Result has 229 places, 599 transitions, 9572 flow [2023-08-26 13:13:04,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9572, PETRI_PLACES=229, PETRI_TRANSITIONS=599} [2023-08-26 13:13:04,159 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 158 predicate places. [2023-08-26 13:13:04,159 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 599 transitions, 9572 flow [2023-08-26 13:13:04,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:13:04,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:04,159 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, 1, 1, 1, 1, 1, 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 13:13:04,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 13:13:04,159 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:13:04,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1157750274, now seen corresponding path program 17 times [2023-08-26 13:13:04,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:04,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135297923] [2023-08-26 13:13:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:04,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:04,785 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 13:13:04,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135297923] [2023-08-26 13:13:04,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135297923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:13:04,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:13:04,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:13:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93125758] [2023-08-26 13:13:04,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:13:04,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:13:04,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:13:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:13:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:13:04,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:13:04,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 599 transitions, 9572 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 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 13:13:04,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:13:04,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:13:04,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:13:19,419 INFO L124 PetriNetUnfolderBase]: 37907/69849 cut-off events. [2023-08-26 13:13:19,419 INFO L125 PetriNetUnfolderBase]: For 809243/816330 co-relation queries the response was YES. [2023-08-26 13:13:20,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372307 conditions, 69849 events. 37907/69849 cut-off events. For 809243/816330 co-relation queries the response was YES. Maximal size of possible extension queue 1965. Compared 678471 event pairs, 19546 based on Foata normal form. 596/68789 useless extension candidates. Maximal degree in co-relation 372220. Up to 59810 conditions per place. [2023-08-26 13:13:20,724 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 543 selfloop transitions, 62 changer transitions 33/690 dead transitions. [2023-08-26 13:13:20,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 690 transitions, 11776 flow [2023-08-26 13:13:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:13:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:13:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1156 transitions. [2023-08-26 13:13:20,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965635738831615 [2023-08-26 13:13:20,725 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1156 transitions. [2023-08-26 13:13:20,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1156 transitions. [2023-08-26 13:13:20,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:20,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1156 transitions. [2023-08-26 13:13:20,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.5) internal successors, (1156), 8 states have internal predecessors, (1156), 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 13:13:20,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 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 13:13:20,729 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 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 13:13:20,729 INFO L175 Difference]: Start difference. First operand has 229 places, 599 transitions, 9572 flow. Second operand 8 states and 1156 transitions. [2023-08-26 13:13:20,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 690 transitions, 11776 flow [2023-08-26 13:13:27,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 690 transitions, 11263 flow, removed 237 selfloop flow, removed 3 redundant places. [2023-08-26 13:13:27,324 INFO L231 Difference]: Finished difference. Result has 237 places, 604 transitions, 9383 flow [2023-08-26 13:13:27,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=9105, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9383, PETRI_PLACES=237, PETRI_TRANSITIONS=604} [2023-08-26 13:13:27,325 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 166 predicate places. [2023-08-26 13:13:27,325 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 604 transitions, 9383 flow [2023-08-26 13:13:27,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 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 13:13:27,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:27,326 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, 1, 1, 1, 1, 1, 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 13:13:27,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 13:13:27,326 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:13:27,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash -953748810, now seen corresponding path program 18 times [2023-08-26 13:13:27,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:27,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554710535] [2023-08-26 13:13:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:27,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:28,226 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 13:13:28,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:28,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554710535] [2023-08-26 13:13:28,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554710535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:13:28,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:13:28,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:13:28,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685259673] [2023-08-26 13:13:28,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:13:28,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:13:28,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:13:28,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:13:28,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:13:28,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:13:28,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 604 transitions, 9383 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 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 13:13:28,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:13:28,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:13:28,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:13:42,952 INFO L124 PetriNetUnfolderBase]: 37769/69705 cut-off events. [2023-08-26 13:13:42,952 INFO L125 PetriNetUnfolderBase]: For 810845/817805 co-relation queries the response was YES. [2023-08-26 13:13:43,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372742 conditions, 69705 events. 37769/69705 cut-off events. For 810845/817805 co-relation queries the response was YES. Maximal size of possible extension queue 1949. Compared 677188 event pairs, 20041 based on Foata normal form. 612/68703 useless extension candidates. Maximal degree in co-relation 372651. Up to 59921 conditions per place. [2023-08-26 13:13:44,351 INFO L140 encePairwiseOnDemand]: 280/291 looper letters, 547 selfloop transitions, 92 changer transitions 11/702 dead transitions. [2023-08-26 13:13:44,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 702 transitions, 11952 flow [2023-08-26 13:13:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:13:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:13:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1271 transitions. [2023-08-26 13:13:44,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852997327224131 [2023-08-26 13:13:44,353 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1271 transitions. [2023-08-26 13:13:44,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1271 transitions. [2023-08-26 13:13:44,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:44,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1271 transitions. [2023-08-26 13:13:44,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.22222222222223) internal successors, (1271), 9 states have internal predecessors, (1271), 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 13:13:44,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 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 13:13:44,356 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 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 13:13:44,356 INFO L175 Difference]: Start difference. First operand has 237 places, 604 transitions, 9383 flow. Second operand 9 states and 1271 transitions. [2023-08-26 13:13:44,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 702 transitions, 11952 flow [2023-08-26 13:13:50,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 702 transitions, 11816 flow, removed 26 selfloop flow, removed 4 redundant places. [2023-08-26 13:13:50,467 INFO L231 Difference]: Finished difference. Result has 246 places, 629 transitions, 10099 flow [2023-08-26 13:13:50,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=9267, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10099, PETRI_PLACES=246, PETRI_TRANSITIONS=629} [2023-08-26 13:13:50,468 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 175 predicate places. [2023-08-26 13:13:50,468 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 629 transitions, 10099 flow [2023-08-26 13:13:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 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 13:13:50,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:50,469 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, 1, 1, 1, 1, 1, 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 13:13:50,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 13:13:50,469 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:13:50,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1224232156, now seen corresponding path program 19 times [2023-08-26 13:13:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:50,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551686052] [2023-08-26 13:13:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:50,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:50,919 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 13:13:50,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:50,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551686052] [2023-08-26 13:13:50,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551686052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:13:50,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:13:50,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:13:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339899036] [2023-08-26 13:13:50,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:13:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:13:50,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:13:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:13:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:13:50,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:13:50,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 629 transitions, 10099 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:13:50,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:13:50,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:13:50,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:14:09,451 INFO L124 PetriNetUnfolderBase]: 44677/83817 cut-off events. [2023-08-26 13:14:09,451 INFO L125 PetriNetUnfolderBase]: For 982708/988433 co-relation queries the response was YES. [2023-08-26 13:14:10,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443859 conditions, 83817 events. 44677/83817 cut-off events. For 982708/988433 co-relation queries the response was YES. Maximal size of possible extension queue 2604. Compared 856292 event pairs, 14631 based on Foata normal form. 3017/85937 useless extension candidates. Maximal degree in co-relation 443763. Up to 16392 conditions per place. [2023-08-26 13:14:11,092 INFO L140 encePairwiseOnDemand]: 277/291 looper letters, 602 selfloop transitions, 350 changer transitions 22/1026 dead transitions. [2023-08-26 13:14:11,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1026 transitions, 17463 flow [2023-08-26 13:14:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:14:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:14:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2044 transitions. [2023-08-26 13:14:11,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-08-26 13:14:11,094 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2044 transitions. [2023-08-26 13:14:11,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2044 transitions. [2023-08-26 13:14:11,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:14:11,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2044 transitions. [2023-08-26 13:14:11,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 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 13:14:11,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 291.0) internal successors, (4365), 15 states have internal predecessors, (4365), 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 13:14:11,101 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 291.0) internal successors, (4365), 15 states have internal predecessors, (4365), 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 13:14:11,101 INFO L175 Difference]: Start difference. First operand has 246 places, 629 transitions, 10099 flow. Second operand 14 states and 2044 transitions. [2023-08-26 13:14:11,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1026 transitions, 17463 flow [2023-08-26 13:14:19,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1026 transitions, 17134 flow, removed 109 selfloop flow, removed 4 redundant places. [2023-08-26 13:14:19,720 INFO L231 Difference]: Finished difference. Result has 263 places, 741 transitions, 13081 flow [2023-08-26 13:14:19,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=9663, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13081, PETRI_PLACES=263, PETRI_TRANSITIONS=741} [2023-08-26 13:14:19,720 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 192 predicate places. [2023-08-26 13:14:19,720 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 741 transitions, 13081 flow [2023-08-26 13:14:19,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:14:19,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:14:19,721 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, 1, 1, 1, 1, 1, 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 13:14:19,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 13:14:19,721 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:14:19,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:14:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1314551004, now seen corresponding path program 20 times [2023-08-26 13:14:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:14:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531308194] [2023-08-26 13:14:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:14:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:14:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:14:20,076 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 13:14:20,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:14:20,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531308194] [2023-08-26 13:14:20,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531308194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:14:20,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:14:20,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:14:20,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244056267] [2023-08-26 13:14:20,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:14:20,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:14:20,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:14:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:14:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:14:20,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:14:20,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 741 transitions, 13081 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 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 13:14:20,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:14:20,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:14:20,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:14:40,950 INFO L124 PetriNetUnfolderBase]: 45608/83378 cut-off events. [2023-08-26 13:14:40,950 INFO L125 PetriNetUnfolderBase]: For 1158257/1166638 co-relation queries the response was YES. [2023-08-26 13:14:42,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467529 conditions, 83378 events. 45608/83378 cut-off events. For 1158257/1166638 co-relation queries the response was YES. Maximal size of possible extension queue 2460. Compared 825831 event pairs, 18870 based on Foata normal form. 1306/82648 useless extension candidates. Maximal degree in co-relation 467426. Up to 46213 conditions per place. [2023-08-26 13:14:42,689 INFO L140 encePairwiseOnDemand]: 278/291 looper letters, 567 selfloop transitions, 316 changer transitions 24/959 dead transitions. [2023-08-26 13:14:42,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 959 transitions, 17572 flow [2023-08-26 13:14:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 13:14:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 13:14:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1881 transitions. [2023-08-26 13:14:42,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972244250594766 [2023-08-26 13:14:42,691 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1881 transitions. [2023-08-26 13:14:42,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1881 transitions. [2023-08-26 13:14:42,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:14:42,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1881 transitions. [2023-08-26 13:14:42,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.69230769230768) internal successors, (1881), 13 states have internal predecessors, (1881), 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 13:14:42,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 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 13:14:42,696 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 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 13:14:42,696 INFO L175 Difference]: Start difference. First operand has 263 places, 741 transitions, 13081 flow. Second operand 13 states and 1881 transitions. [2023-08-26 13:14:42,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 959 transitions, 17572 flow [2023-08-26 13:14:53,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 959 transitions, 17174 flow, removed 167 selfloop flow, removed 1 redundant places. [2023-08-26 13:14:53,280 INFO L231 Difference]: Finished difference. Result has 279 places, 765 transitions, 14161 flow [2023-08-26 13:14:53,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=12783, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14161, PETRI_PLACES=279, PETRI_TRANSITIONS=765} [2023-08-26 13:14:53,281 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 208 predicate places. [2023-08-26 13:14:53,281 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 765 transitions, 14161 flow [2023-08-26 13:14:53,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 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 13:14:53,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:14:53,281 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, 1, 1, 1, 1, 1, 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 13:14:53,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 13:14:53,282 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:14:53,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:14:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash -210601820, now seen corresponding path program 21 times [2023-08-26 13:14:53,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:14:53,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610177036] [2023-08-26 13:14:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:14:53,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:14:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:14:53,889 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 13:14:53,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:14:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610177036] [2023-08-26 13:14:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610177036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:14:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:14:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 13:14:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95371826] [2023-08-26 13:14:53,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:14:53,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 13:14:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:14:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 13:14:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-26 13:14:53,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:14:53,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 765 transitions, 14161 flow. Second operand has 11 states, 11 states have (on average 131.36363636363637) internal successors, (1445), 11 states have internal predecessors, (1445), 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 13:14:53,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:14:53,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:14:53,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:15:16,245 INFO L124 PetriNetUnfolderBase]: 45969/85877 cut-off events. [2023-08-26 13:15:16,245 INFO L125 PetriNetUnfolderBase]: For 1254578/1259576 co-relation queries the response was YES. [2023-08-26 13:15:17,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487215 conditions, 85877 events. 45969/85877 cut-off events. For 1254578/1259576 co-relation queries the response was YES. Maximal size of possible extension queue 2617. Compared 876855 event pairs, 19728 based on Foata normal form. 1333/85567 useless extension candidates. Maximal degree in co-relation 487106. Up to 51944 conditions per place. [2023-08-26 13:15:18,148 INFO L140 encePairwiseOnDemand]: 278/291 looper letters, 660 selfloop transitions, 216 changer transitions 33/961 dead transitions. [2023-08-26 13:15:18,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 961 transitions, 18437 flow [2023-08-26 13:15:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:15:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:15:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1599 transitions. [2023-08-26 13:15:18,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49953139643861294 [2023-08-26 13:15:18,150 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1599 transitions. [2023-08-26 13:15:18,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1599 transitions. [2023-08-26 13:15:18,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:15:18,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1599 transitions. [2023-08-26 13:15:18,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.36363636363637) internal successors, (1599), 11 states have internal predecessors, (1599), 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 13:15:18,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:15:18,153 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 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 13:15:18,154 INFO L175 Difference]: Start difference. First operand has 279 places, 765 transitions, 14161 flow. Second operand 11 states and 1599 transitions. [2023-08-26 13:15:18,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 961 transitions, 18437 flow [2023-08-26 13:15:31,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 961 transitions, 18131 flow, removed 132 selfloop flow, removed 1 redundant places. [2023-08-26 13:15:31,403 INFO L231 Difference]: Finished difference. Result has 294 places, 798 transitions, 15368 flow [2023-08-26 13:15:31,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=13888, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15368, PETRI_PLACES=294, PETRI_TRANSITIONS=798} [2023-08-26 13:15:31,404 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 223 predicate places. [2023-08-26 13:15:31,404 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 798 transitions, 15368 flow [2023-08-26 13:15:31,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.36363636363637) internal successors, (1445), 11 states have internal predecessors, (1445), 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 13:15:31,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:15:31,405 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, 1, 1, 1, 1, 1, 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 13:15:31,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 13:15:31,405 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:15:31,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:15:31,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1906889198, now seen corresponding path program 22 times [2023-08-26 13:15:31,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:15:31,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052386483] [2023-08-26 13:15:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:15:31,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:15:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:15:31,769 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 13:15:31,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:15:31,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052386483] [2023-08-26 13:15:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052386483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:15:31,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:15:31,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:15:31,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804985682] [2023-08-26 13:15:31,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:15:31,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:15:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:15:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:15:31,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:15:31,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 13:15:31,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 798 transitions, 15368 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 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 13:15:31,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:15:31,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 13:15:31,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand