/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/popl20-threaded-sum-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:48:42,869 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:48:42,935 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 13:48:42,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:48:42,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:48:42,970 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:48:42,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:48:42,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:48:42,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:48:42,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:48:42,974 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:48:42,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:48:42,975 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:48:42,976 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:48:42,976 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:48:42,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:48:42,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:48:42,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:48:42,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:48:42,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:48:42,977 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:48:42,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:48:42,977 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:48:42,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:48:42,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:48:42,978 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:48:42,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:48:42,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:48:42,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:48:42,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:48:42,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:48:42,980 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:48:42,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:48:42,980 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:48:42,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:48:42,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:48:43,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:48:43,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:48:43,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:48:43,266 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:48:43,266 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:48:43,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2023-08-26 13:48:44,231 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:48:44,460 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:48:44,460 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2023-08-26 13:48:44,465 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdcdcc8bb/3dd7db5bf9764f5dbf044be7d7399673/FLAG44f39ce8d [2023-08-26 13:48:44,473 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdcdcc8bb/3dd7db5bf9764f5dbf044be7d7399673 [2023-08-26 13:48:44,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:48:44,476 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:48:44,476 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:48:44,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:48:44,478 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:48:44,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc3b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44, skipping insertion in model container [2023-08-26 13:48:44,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,492 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:48:44,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:48:44,605 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:48:44,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:48:44,631 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:48:44,631 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:48:44,636 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:48:44,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44 WrapperNode [2023-08-26 13:48:44,636 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:48:44,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:48:44,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:48:44,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:48:44,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,659 INFO L138 Inliner]: procedures = 22, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-08-26 13:48:44,660 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:48:44,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:48:44,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:48:44,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:48:44,666 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,669 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:48:44,679 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:48:44,679 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:48:44,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:48:44,680 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (1/1) ... [2023-08-26 13:48:44,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:48:44,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:48:44,747 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 13:48:44,764 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 13:48:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:48:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:48:44,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:48:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:48:44,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:48:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:48:44,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:48:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:48:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:48:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:48:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:48:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:48:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:48:44,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:48:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:48:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:48:44,789 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 13:48:44,875 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:48:44,878 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:48:45,129 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:48:45,166 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:48:45,166 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 13:48:45,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:48:45 BoogieIcfgContainer [2023-08-26 13:48:45,168 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:48:45,169 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:48:45,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:48:45,171 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:48:45,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:48:44" (1/3) ... [2023-08-26 13:48:45,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb5631b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:48:45, skipping insertion in model container [2023-08-26 13:48:45,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:48:44" (2/3) ... [2023-08-26 13:48:45,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb5631b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:48:45, skipping insertion in model container [2023-08-26 13:48:45,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:48:45" (3/3) ... [2023-08-26 13:48:45,173 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2023-08-26 13:48:45,185 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:48:45,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:48:45,186 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:48:45,231 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:48:45,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 124 transitions, 272 flow [2023-08-26 13:48:45,309 INFO L124 PetriNetUnfolderBase]: 8/121 cut-off events. [2023-08-26 13:48:45,309 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:48:45,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 121 events. 8/121 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2023-08-26 13:48:45,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 124 transitions, 272 flow [2023-08-26 13:48:45,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 110 transitions, 238 flow [2023-08-26 13:48:45,320 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:48:45,326 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 110 transitions, 238 flow [2023-08-26 13:48:45,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 110 transitions, 238 flow [2023-08-26 13:48:45,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 110 transitions, 238 flow [2023-08-26 13:48:45,344 INFO L124 PetriNetUnfolderBase]: 8/110 cut-off events. [2023-08-26 13:48:45,345 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:48:45,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 110 events. 8/110 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2023-08-26 13:48:45,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 1310 [2023-08-26 13:48:48,223 INFO L134 LiptonReduction]: Checked pairs total: 2452 [2023-08-26 13:48:48,223 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-26 13:48:48,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:48:48,237 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;@3664ad09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:48:48,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:48:48,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:48:48,238 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:48:48,238 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:48:48,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:48,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:48:48,239 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 13:48:48,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:48,242 INFO L85 PathProgramCache]: Analyzing trace with hash 487, now seen corresponding path program 1 times [2023-08-26 13:48:48,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:48,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86111584] [2023-08-26 13:48:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:48,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:48,309 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 13:48:48,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:48,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86111584] [2023-08-26 13:48:48,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86111584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:48,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:48,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:48:48,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351529767] [2023-08-26 13:48:48,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:48,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:48:48,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:48:48,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:48:48,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 225 [2023-08-26 13:48:48,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:48,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 225 [2023-08-26 13:48:48,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:48,434 INFO L124 PetriNetUnfolderBase]: 461/724 cut-off events. [2023-08-26 13:48:48,434 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 13:48:48,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 724 events. 461/724 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3490 event pairs, 362 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 1095. Up to 708 conditions per place. [2023-08-26 13:48:48,441 INFO L140 encePairwiseOnDemand]: 223/225 looper letters, 30 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2023-08-26 13:48:48,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 148 flow [2023-08-26 13:48:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:48:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:48:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 248 transitions. [2023-08-26 13:48:48,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2023-08-26 13:48:48,451 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 248 transitions. [2023-08-26 13:48:48,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 248 transitions. [2023-08-26 13:48:48,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:48,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 248 transitions. [2023-08-26 13:48:48,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,458 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,460 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 92 flow. Second operand 2 states and 248 transitions. [2023-08-26 13:48:48,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 148 flow [2023-08-26 13:48:48,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:48:48,463 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 76 flow [2023-08-26 13:48:48,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-08-26 13:48:48,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-08-26 13:48:48,466 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 76 flow [2023-08-26 13:48:48,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:48,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:48:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:48:48,467 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 13:48:48,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 481279, now seen corresponding path program 1 times [2023-08-26 13:48:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:48,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993423079] [2023-08-26 13:48:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:48,675 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 13:48:48,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:48,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993423079] [2023-08-26 13:48:48,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993423079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:48,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:48,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:48:48,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177853432] [2023-08-26 13:48:48,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:48,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:48:48,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:48,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:48:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:48:48,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 225 [2023-08-26 13:48:48,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:48,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 225 [2023-08-26 13:48:48,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:48,781 INFO L124 PetriNetUnfolderBase]: 436/684 cut-off events. [2023-08-26 13:48:48,781 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:48:48,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 684 events. 436/684 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3271 event pairs, 343 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 1364. Up to 667 conditions per place. [2023-08-26 13:48:48,785 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 27 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 13:48:48,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 128 flow [2023-08-26 13:48:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:48:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:48:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-08-26 13:48:48,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2023-08-26 13:48:48,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-08-26 13:48:48,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-08-26 13:48:48,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:48,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-08-26 13:48:48,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,796 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 76 flow. Second operand 3 states and 288 transitions. [2023-08-26 13:48:48,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 128 flow [2023-08-26 13:48:48,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:48:48,797 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 74 flow [2023-08-26 13:48:48,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-08-26 13:48:48,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-08-26 13:48:48,800 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 74 flow [2023-08-26 13:48:48,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:48,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:48:48,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:48:48,802 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 13:48:48,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:48,811 INFO L85 PathProgramCache]: Analyzing trace with hash 481280, now seen corresponding path program 1 times [2023-08-26 13:48:48,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:48,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336021754] [2023-08-26 13:48:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:48,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:48,947 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 13:48:48,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336021754] [2023-08-26 13:48:48,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336021754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:48,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:48,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:48:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896384111] [2023-08-26 13:48:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:48,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:48:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:48:48,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:48:48,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 225 [2023-08-26 13:48:48,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:48,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 225 [2023-08-26 13:48:48,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:49,023 INFO L124 PetriNetUnfolderBase]: 411/644 cut-off events. [2023-08-26 13:48:49,024 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:48:49,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 644 events. 411/644 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3029 event pairs, 324 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 1285. Up to 627 conditions per place. [2023-08-26 13:48:49,027 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 25 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-26 13:48:49,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 122 flow [2023-08-26 13:48:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:48:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:48:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-26 13:48:49,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103703703703704 [2023-08-26 13:48:49,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-26 13:48:49,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-26 13:48:49,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:49,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-26 13:48:49,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,040 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 74 flow. Second operand 3 states and 277 transitions. [2023-08-26 13:48:49,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 122 flow [2023-08-26 13:48:49,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:49,040 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 71 flow [2023-08-26 13:48:49,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-26 13:48:49,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2023-08-26 13:48:49,041 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 71 flow [2023-08-26 13:48:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:49,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:48:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:48:49,042 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:48:49,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 462519444, now seen corresponding path program 1 times [2023-08-26 13:48:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843747433] [2023-08-26 13:48:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:49,070 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 13:48:49,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:49,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843747433] [2023-08-26 13:48:49,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843747433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:49,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:49,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:48:49,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89765680] [2023-08-26 13:48:49,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:49,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:48:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:48:49,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:48:49,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 225 [2023-08-26 13:48:49,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:49,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 225 [2023-08-26 13:48:49,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:49,118 INFO L124 PetriNetUnfolderBase]: 394/614 cut-off events. [2023-08-26 13:48:49,118 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:48:49,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 614 events. 394/614 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2853 event pairs, 309 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 1226. Up to 597 conditions per place. [2023-08-26 13:48:49,121 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 23 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 13:48:49,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 115 flow [2023-08-26 13:48:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:48:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:48:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-26 13:48:49,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-08-26 13:48:49,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-26 13:48:49,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-26 13:48:49,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:49,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-26 13:48:49,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,124 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 71 flow. Second operand 3 states and 275 transitions. [2023-08-26 13:48:49,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 115 flow [2023-08-26 13:48:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:49,125 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 68 flow [2023-08-26 13:48:49,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-26 13:48:49,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -9 predicate places. [2023-08-26 13:48:49,126 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 68 flow [2023-08-26 13:48:49,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:49,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:48:49,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:48:49,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:48:49,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 462519442, now seen corresponding path program 1 times [2023-08-26 13:48:49,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:49,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208612990] [2023-08-26 13:48:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:49,167 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 13:48:49,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:49,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208612990] [2023-08-26 13:48:49,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208612990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:49,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:49,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:48:49,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496055080] [2023-08-26 13:48:49,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:49,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:48:49,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:49,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:48:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:48:49,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 225 [2023-08-26 13:48:49,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:49,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 225 [2023-08-26 13:48:49,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:49,220 INFO L124 PetriNetUnfolderBase]: 377/584 cut-off events. [2023-08-26 13:48:49,220 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:48:49,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 584 events. 377/584 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2634 event pairs, 294 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 1167. Up to 567 conditions per place. [2023-08-26 13:48:49,224 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 21 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 13:48:49,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 27 transitions, 108 flow [2023-08-26 13:48:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:48:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:48:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-26 13:48:49,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177777777777778 [2023-08-26 13:48:49,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-26 13:48:49,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-26 13:48:49,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:49,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-26 13:48:49,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,227 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 68 flow. Second operand 3 states and 282 transitions. [2023-08-26 13:48:49,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 27 transitions, 108 flow [2023-08-26 13:48:49,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:49,228 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 65 flow [2023-08-26 13:48:49,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-26 13:48:49,230 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -10 predicate places. [2023-08-26 13:48:49,230 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 65 flow [2023-08-26 13:48:49,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:49,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:48:49,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:48:49,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:48:49,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2099564634, now seen corresponding path program 1 times [2023-08-26 13:48:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:49,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841153540] [2023-08-26 13:48:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:49,382 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 13:48:49,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841153540] [2023-08-26 13:48:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841153540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:49,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:49,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:48:49,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963057680] [2023-08-26 13:48:49,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:48:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:48:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:48:49,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 225 [2023-08-26 13:48:49,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:49,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 225 [2023-08-26 13:48:49,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:49,439 INFO L124 PetriNetUnfolderBase]: 293/464 cut-off events. [2023-08-26 13:48:49,440 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:48:49,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 464 events. 293/464 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2013 event pairs, 228 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 928. Up to 447 conditions per place. [2023-08-26 13:48:49,442 INFO L140 encePairwiseOnDemand]: 223/225 looper letters, 20 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-26 13:48:49,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 26 transitions, 105 flow [2023-08-26 13:48:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:48:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:48:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-08-26 13:48:49,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397037037037037 [2023-08-26 13:48:49,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-08-26 13:48:49,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-08-26 13:48:49,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:49,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-08-26 13:48:49,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,445 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 65 flow. Second operand 3 states and 268 transitions. [2023-08-26 13:48:49,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 26 transitions, 105 flow [2023-08-26 13:48:49,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:49,447 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 64 flow [2023-08-26 13:48:49,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-26 13:48:49,449 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -10 predicate places. [2023-08-26 13:48:49,451 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 64 flow [2023-08-26 13:48:49,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:49,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:48:49,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:48:49,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:48:49,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2099564633, now seen corresponding path program 1 times [2023-08-26 13:48:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:49,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344615382] [2023-08-26 13:48:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:49,566 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 13:48:49,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344615382] [2023-08-26 13:48:49,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344615382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:49,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:49,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:48:49,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688661495] [2023-08-26 13:48:49,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:49,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:48:49,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:49,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:48:49,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:48:49,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 225 [2023-08-26 13:48:49,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 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 13:48:49,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:49,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 225 [2023-08-26 13:48:49,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:49,613 INFO L124 PetriNetUnfolderBase]: 209/344 cut-off events. [2023-08-26 13:48:49,613 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:48:49,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 344 events. 209/344 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1402 event pairs, 162 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 689. Up to 327 conditions per place. [2023-08-26 13:48:49,614 INFO L140 encePairwiseOnDemand]: 223/225 looper letters, 19 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-26 13:48:49,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 25 transitions, 102 flow [2023-08-26 13:48:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:48:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:48:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-26 13:48:49,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2023-08-26 13:48:49,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-26 13:48:49,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-26 13:48:49,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:49,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-26 13:48:49,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,620 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 64 flow. Second operand 3 states and 252 transitions. [2023-08-26 13:48:49,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 25 transitions, 102 flow [2023-08-26 13:48:49,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:49,621 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 63 flow [2023-08-26 13:48:49,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-08-26 13:48:49,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -10 predicate places. [2023-08-26 13:48:49,622 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 63 flow [2023-08-26 13:48:49,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 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 13:48:49,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:49,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:48:49,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:48:49,623 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 13:48:49,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1409181287, now seen corresponding path program 1 times [2023-08-26 13:48:49,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:49,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27833123] [2023-08-26 13:48:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:49,913 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 13:48:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:49,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27833123] [2023-08-26 13:48:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27833123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:49,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:49,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:48:49,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702869288] [2023-08-26 13:48:49,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:49,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:48:49,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:48:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:48:49,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 225 [2023-08-26 13:48:49,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:49,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 225 [2023-08-26 13:48:49,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:50,036 INFO L124 PetriNetUnfolderBase]: 637/914 cut-off events. [2023-08-26 13:48:50,036 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:48:50,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 914 events. 637/914 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3631 event pairs, 16 based on Foata normal form. 0/652 useless extension candidates. Maximal degree in co-relation 1829. Up to 586 conditions per place. [2023-08-26 13:48:50,039 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 50 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2023-08-26 13:48:50,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 59 transitions, 249 flow [2023-08-26 13:48:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:48:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:48:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2023-08-26 13:48:50,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4871111111111111 [2023-08-26 13:48:50,041 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2023-08-26 13:48:50,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2023-08-26 13:48:50,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:50,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2023-08-26 13:48:50,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,044 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,044 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 63 flow. Second operand 5 states and 548 transitions. [2023-08-26 13:48:50,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 59 transitions, 249 flow [2023-08-26 13:48:50,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 59 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:50,046 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 107 flow [2023-08-26 13:48:50,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-26 13:48:50,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-08-26 13:48:50,048 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 107 flow [2023-08-26 13:48:50,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:50,048 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] [2023-08-26 13:48:50,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:48:50,048 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 13:48:50,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1661146381, now seen corresponding path program 1 times [2023-08-26 13:48:50,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:50,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605557707] [2023-08-26 13:48:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:50,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:48:50,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:50,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605557707] [2023-08-26 13:48:50,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605557707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:50,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:50,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:48:50,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238352441] [2023-08-26 13:48:50,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:50,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:48:50,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:48:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:48:50,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 225 [2023-08-26 13:48:50,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:50,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 225 [2023-08-26 13:48:50,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:50,501 INFO L124 PetriNetUnfolderBase]: 915/1316 cut-off events. [2023-08-26 13:48:50,501 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2023-08-26 13:48:50,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3479 conditions, 1316 events. 915/1316 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4853 event pairs, 145 based on Foata normal form. 54/1276 useless extension candidates. Maximal degree in co-relation 3472. Up to 1013 conditions per place. [2023-08-26 13:48:50,506 INFO L140 encePairwiseOnDemand]: 220/225 looper letters, 55 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2023-08-26 13:48:50,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 348 flow [2023-08-26 13:48:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 13:48:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 13:48:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 420 transitions. [2023-08-26 13:48:50,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-26 13:48:50,508 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 420 transitions. [2023-08-26 13:48:50,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 420 transitions. [2023-08-26 13:48:50,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:50,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 420 transitions. [2023-08-26 13:48:50,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,510 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,510 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 107 flow. Second operand 4 states and 420 transitions. [2023-08-26 13:48:50,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 348 flow [2023-08-26 13:48:50,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 62 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:50,514 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 160 flow [2023-08-26 13:48:50,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-08-26 13:48:50,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-26 13:48:50,515 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 160 flow [2023-08-26 13:48:50,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:50,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:50,515 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] [2023-08-26 13:48:50,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:48:50,516 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 13:48:50,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:50,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1394055978, now seen corresponding path program 1 times [2023-08-26 13:48:50,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:50,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105464360] [2023-08-26 13:48:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:50,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:50,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105464360] [2023-08-26 13:48:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105464360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:48:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768750622] [2023-08-26 13:48:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:50,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:48:50,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:48:50,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:48:50,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 13:48:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:50,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:48:50,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:48:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:50,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:48:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768750622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:48:51,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:48:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2023-08-26 13:48:51,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102198209] [2023-08-26 13:48:51,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:48:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 13:48:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 13:48:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-26 13:48:51,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 225 [2023-08-26 13:48:51,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 160 flow. Second operand has 11 states, 11 states have (on average 95.81818181818181) internal successors, (1054), 11 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:51,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:51,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 225 [2023-08-26 13:48:51,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:51,401 INFO L124 PetriNetUnfolderBase]: 1489/2150 cut-off events. [2023-08-26 13:48:51,402 INFO L125 PetriNetUnfolderBase]: For 2032/2032 co-relation queries the response was YES. [2023-08-26 13:48:51,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6302 conditions, 2150 events. 1489/2150 cut-off events. For 2032/2032 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8692 event pairs, 145 based on Foata normal form. 140/2290 useless extension candidates. Maximal degree in co-relation 6293. Up to 561 conditions per place. [2023-08-26 13:48:51,413 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 104 selfloop transitions, 21 changer transitions 3/128 dead transitions. [2023-08-26 13:48:51,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 128 transitions, 760 flow [2023-08-26 13:48:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:48:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:48:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 841 transitions. [2023-08-26 13:48:51,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672222222222222 [2023-08-26 13:48:51,415 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 841 transitions. [2023-08-26 13:48:51,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 841 transitions. [2023-08-26 13:48:51,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:51,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 841 transitions. [2023-08-26 13:48:51,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.125) internal successors, (841), 8 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:51,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:51,419 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:51,419 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 160 flow. Second operand 8 states and 841 transitions. [2023-08-26 13:48:51,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 128 transitions, 760 flow [2023-08-26 13:48:51,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 128 transitions, 760 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:48:51,424 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 340 flow [2023-08-26 13:48:51,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-26 13:48:51,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2023-08-26 13:48:51,425 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 340 flow [2023-08-26 13:48:51,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 95.81818181818181) internal successors, (1054), 11 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:51,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:51,426 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] [2023-08-26 13:48:51,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 13:48:51,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 13:48:51,631 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 13:48:51,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1165956297, now seen corresponding path program 1 times [2023-08-26 13:48:51,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:51,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910980179] [2023-08-26 13:48:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:51,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910980179] [2023-08-26 13:48:51,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910980179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:48:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315527011] [2023-08-26 13:48:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:51,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:48:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:48:51,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:48:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 13:48:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:52,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 13:48:52,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:48:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 13:48:52,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 13:48:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315527011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:52,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 13:48:52,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-08-26 13:48:52,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303595687] [2023-08-26 13:48:52,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:52,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:48:52,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:52,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:48:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:48:52,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 225 [2023-08-26 13:48:52,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:52,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:52,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 225 [2023-08-26 13:48:52,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:52,271 INFO L124 PetriNetUnfolderBase]: 1318/1901 cut-off events. [2023-08-26 13:48:52,271 INFO L125 PetriNetUnfolderBase]: For 4664/4664 co-relation queries the response was YES. [2023-08-26 13:48:52,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7014 conditions, 1901 events. 1318/1901 cut-off events. For 4664/4664 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7434 event pairs, 189 based on Foata normal form. 44/1945 useless extension candidates. Maximal degree in co-relation 6998. Up to 1205 conditions per place. [2023-08-26 13:48:52,280 INFO L140 encePairwiseOnDemand]: 221/225 looper letters, 69 selfloop transitions, 9 changer transitions 2/80 dead transitions. [2023-08-26 13:48:52,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 644 flow [2023-08-26 13:48:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 13:48:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 13:48:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-08-26 13:48:52,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-08-26 13:48:52,281 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-08-26 13:48:52,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-08-26 13:48:52,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:52,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-08-26 13:48:52,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:52,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:52,285 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:52,285 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 340 flow. Second operand 4 states and 440 transitions. [2023-08-26 13:48:52,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 644 flow [2023-08-26 13:48:52,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 628 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-26 13:48:52,295 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 389 flow [2023-08-26 13:48:52,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-26 13:48:52,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2023-08-26 13:48:52,295 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 389 flow [2023-08-26 13:48:52,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:52,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:52,296 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] [2023-08-26 13:48:52,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 13:48:52,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 13:48:52,500 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 13:48:52,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1375543895, now seen corresponding path program 2 times [2023-08-26 13:48:52,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:52,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431035307] [2023-08-26 13:48:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:52,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:52,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:52,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431035307] [2023-08-26 13:48:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431035307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:52,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:52,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:48:52,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537472836] [2023-08-26 13:48:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:52,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:48:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:48:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:48:52,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 225 [2023-08-26 13:48:52,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:52,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:52,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 225 [2023-08-26 13:48:52,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:53,092 INFO L124 PetriNetUnfolderBase]: 2561/3718 cut-off events. [2023-08-26 13:48:53,092 INFO L125 PetriNetUnfolderBase]: For 8383/8383 co-relation queries the response was YES. [2023-08-26 13:48:53,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13410 conditions, 3718 events. 2561/3718 cut-off events. For 8383/8383 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17089 event pairs, 363 based on Foata normal form. 14/3732 useless extension candidates. Maximal degree in co-relation 13391. Up to 1639 conditions per place. [2023-08-26 13:48:53,114 INFO L140 encePairwiseOnDemand]: 220/225 looper letters, 119 selfloop transitions, 22 changer transitions 0/141 dead transitions. [2023-08-26 13:48:53,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 141 transitions, 1111 flow [2023-08-26 13:48:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:48:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:48:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 556 transitions. [2023-08-26 13:48:53,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49422222222222223 [2023-08-26 13:48:53,116 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 556 transitions. [2023-08-26 13:48:53,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 556 transitions. [2023-08-26 13:48:53,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:53,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 556 transitions. [2023-08-26 13:48:53,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,119 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,119 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 389 flow. Second operand 5 states and 556 transitions. [2023-08-26 13:48:53,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 141 transitions, 1111 flow [2023-08-26 13:48:53,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 141 transitions, 1104 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:53,136 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 521 flow [2023-08-26 13:48:53,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-08-26 13:48:53,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2023-08-26 13:48:53,136 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 521 flow [2023-08-26 13:48:53,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:53,137 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] [2023-08-26 13:48:53,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:48:53,137 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 13:48:53,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash -980309569, now seen corresponding path program 3 times [2023-08-26 13:48:53,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:53,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198042279] [2023-08-26 13:48:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:53,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:53,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198042279] [2023-08-26 13:48:53,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198042279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:48:53,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:48:53,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:48:53,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682646984] [2023-08-26 13:48:53,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:48:53,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:48:53,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:48:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:48:53,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 225 [2023-08-26 13:48:53,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 521 flow. Second operand has 6 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:53,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 225 [2023-08-26 13:48:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:53,841 INFO L124 PetriNetUnfolderBase]: 3219/4698 cut-off events. [2023-08-26 13:48:53,841 INFO L125 PetriNetUnfolderBase]: For 12796/12796 co-relation queries the response was YES. [2023-08-26 13:48:53,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18682 conditions, 4698 events. 3219/4698 cut-off events. For 12796/12796 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22524 event pairs, 395 based on Foata normal form. 18/4716 useless extension candidates. Maximal degree in co-relation 18661. Up to 1727 conditions per place. [2023-08-26 13:48:53,868 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 142 selfloop transitions, 41 changer transitions 0/183 dead transitions. [2023-08-26 13:48:53,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 183 transitions, 1516 flow [2023-08-26 13:48:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:48:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:48:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2023-08-26 13:48:53,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907936507936508 [2023-08-26 13:48:53,870 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2023-08-26 13:48:53,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2023-08-26 13:48:53,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:53,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2023-08-26 13:48:53,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 225.0) internal successors, (1800), 8 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,874 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 225.0) internal successors, (1800), 8 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,874 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 521 flow. Second operand 7 states and 773 transitions. [2023-08-26 13:48:53,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 183 transitions, 1516 flow [2023-08-26 13:48:53,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 183 transitions, 1516 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:48:53,907 INFO L231 Difference]: Finished difference. Result has 78 places, 95 transitions, 807 flow [2023-08-26 13:48:53,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=807, PETRI_PLACES=78, PETRI_TRANSITIONS=95} [2023-08-26 13:48:53,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2023-08-26 13:48:53,908 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 95 transitions, 807 flow [2023-08-26 13:48:53,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:53,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:53,908 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] [2023-08-26 13:48:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:48:53,908 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 13:48:53,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2037122489, now seen corresponding path program 4 times [2023-08-26 13:48:53,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:53,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132514142] [2023-08-26 13:48:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:53,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:54,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:54,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132514142] [2023-08-26 13:48:54,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132514142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:48:54,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875001779] [2023-08-26 13:48:54,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:48:54,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:48:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:48:54,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:48:54,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 13:48:54,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:48:54,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:48:54,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 13:48:54,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:48:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:54,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:48:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:54,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875001779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:48:54,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:48:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 10 [2023-08-26 13:48:54,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548283931] [2023-08-26 13:48:54,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:48:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:48:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:48:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:48:54,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 225 [2023-08-26 13:48:54,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 95 transitions, 807 flow. Second operand has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:54,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:54,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 225 [2023-08-26 13:48:54,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:55,619 INFO L124 PetriNetUnfolderBase]: 5880/8501 cut-off events. [2023-08-26 13:48:55,620 INFO L125 PetriNetUnfolderBase]: For 34089/34089 co-relation queries the response was YES. [2023-08-26 13:48:55,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38033 conditions, 8501 events. 5880/8501 cut-off events. For 34089/34089 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 44981 event pairs, 587 based on Foata normal form. 248/8749 useless extension candidates. Maximal degree in co-relation 38007. Up to 2118 conditions per place. [2023-08-26 13:48:55,676 INFO L140 encePairwiseOnDemand]: 216/225 looper letters, 228 selfloop transitions, 161 changer transitions 0/389 dead transitions. [2023-08-26 13:48:55,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 389 transitions, 4097 flow [2023-08-26 13:48:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:48:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:48:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1410 transitions. [2023-08-26 13:48:55,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2023-08-26 13:48:55,679 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1410 transitions. [2023-08-26 13:48:55,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1410 transitions. [2023-08-26 13:48:55,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:55,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1410 transitions. [2023-08-26 13:48:55,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 100.71428571428571) internal successors, (1410), 14 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:55,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 225.0) internal successors, (3375), 15 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:55,685 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 225.0) internal successors, (3375), 15 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:55,685 INFO L175 Difference]: Start difference. First operand has 78 places, 95 transitions, 807 flow. Second operand 14 states and 1410 transitions. [2023-08-26 13:48:55,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 389 transitions, 4097 flow [2023-08-26 13:48:55,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 389 transitions, 3964 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-26 13:48:55,735 INFO L231 Difference]: Finished difference. Result has 100 places, 234 transitions, 2676 flow [2023-08-26 13:48:55,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2676, PETRI_PLACES=100, PETRI_TRANSITIONS=234} [2023-08-26 13:48:55,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2023-08-26 13:48:55,735 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 234 transitions, 2676 flow [2023-08-26 13:48:55,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:55,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:55,736 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] [2023-08-26 13:48:55,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 13:48:55,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:48:55,941 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 13:48:55,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash -96350453, now seen corresponding path program 5 times [2023-08-26 13:48:55,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:55,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105346037] [2023-08-26 13:48:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:55,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:57,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105346037] [2023-08-26 13:48:57,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105346037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:48:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983166074] [2023-08-26 13:48:57,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:48:57,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:48:57,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:48:57,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:48:57,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 13:48:57,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:48:57,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:48:57,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:48:57,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:48:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:58,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:48:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:58,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983166074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:48:58,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:48:58,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-26 13:48:58,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083475422] [2023-08-26 13:48:58,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:48:58,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 13:48:58,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:58,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 13:48:58,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-08-26 13:48:58,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 225 [2023-08-26 13:48:58,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 234 transitions, 2676 flow. Second operand has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:58,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:58,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 225 [2023-08-26 13:48:58,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:49:18,386 INFO L124 PetriNetUnfolderBase]: 26049/37952 cut-off events. [2023-08-26 13:49:18,386 INFO L125 PetriNetUnfolderBase]: For 242078/242078 co-relation queries the response was YES. [2023-08-26 13:49:18,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205264 conditions, 37952 events. 26049/37952 cut-off events. For 242078/242078 co-relation queries the response was YES. Maximal size of possible extension queue 1723. Compared 251254 event pairs, 985 based on Foata normal form. 48/38000 useless extension candidates. Maximal degree in co-relation 205227. Up to 8599 conditions per place. [2023-08-26 13:49:18,668 INFO L140 encePairwiseOnDemand]: 216/225 looper letters, 748 selfloop transitions, 1187 changer transitions 437/2372 dead transitions. [2023-08-26 13:49:18,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 2372 transitions, 29478 flow [2023-08-26 13:49:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-26 13:49:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-26 13:49:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6784 transitions. [2023-08-26 13:49:18,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246635367762128 [2023-08-26 13:49:18,681 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6784 transitions. [2023-08-26 13:49:18,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6784 transitions. [2023-08-26 13:49:18,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:49:18,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6784 transitions. [2023-08-26 13:49:18,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 95.54929577464789) internal successors, (6784), 71 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:18,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 225.0) internal successors, (16200), 72 states have internal predecessors, (16200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:18,723 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 225.0) internal successors, (16200), 72 states have internal predecessors, (16200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:18,723 INFO L175 Difference]: Start difference. First operand has 100 places, 234 transitions, 2676 flow. Second operand 71 states and 6784 transitions. [2023-08-26 13:49:18,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 2372 transitions, 29478 flow [2023-08-26 13:49:19,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 2372 transitions, 29080 flow, removed 144 selfloop flow, removed 5 redundant places. [2023-08-26 13:49:19,998 INFO L231 Difference]: Finished difference. Result has 189 places, 1463 transitions, 20632 flow [2023-08-26 13:49:19,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=20632, PETRI_PLACES=189, PETRI_TRANSITIONS=1463} [2023-08-26 13:49:19,999 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2023-08-26 13:49:19,999 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 1463 transitions, 20632 flow [2023-08-26 13:49:20,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:20,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:49:20,000 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] [2023-08-26 13:49:20,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 13:49:20,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 13:49:20,205 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 13:49:20,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:49:20,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1130565761, now seen corresponding path program 6 times [2023-08-26 13:49:20,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:49:20,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591581273] [2023-08-26 13:49:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:49:20,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:49:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:49:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:22,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:49:22,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591581273] [2023-08-26 13:49:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591581273] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:49:22,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573992714] [2023-08-26 13:49:22,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:49:22,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:49:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:49:22,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:49:22,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 13:49:22,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:49:22,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:49:22,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-26 13:49:22,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:49:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:22,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:49:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:23,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573992714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:49:23,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:49:23,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 25 [2023-08-26 13:49:23,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676100791] [2023-08-26 13:49:23,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:49:23,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-26 13:49:23,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:49:23,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-26 13:49:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-08-26 13:49:23,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 225 [2023-08-26 13:49:23,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 1463 transitions, 20632 flow. Second operand has 27 states, 27 states have (on average 83.55555555555556) internal successors, (2256), 27 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:23,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:49:23,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 225 [2023-08-26 13:49:23,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:49:48,793 INFO L124 PetriNetUnfolderBase]: 41221/60508 cut-off events. [2023-08-26 13:49:48,793 INFO L125 PetriNetUnfolderBase]: For 452961/452961 co-relation queries the response was YES. [2023-08-26 13:49:49,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355634 conditions, 60508 events. 41221/60508 cut-off events. For 452961/452961 co-relation queries the response was YES. Maximal size of possible extension queue 2776. Compared 435087 event pairs, 693 based on Foata normal form. 86/60594 useless extension candidates. Maximal degree in co-relation 355575. Up to 14531 conditions per place. [2023-08-26 13:49:49,452 INFO L140 encePairwiseOnDemand]: 211/225 looper letters, 1293 selfloop transitions, 2504 changer transitions 545/4342 dead transitions. [2023-08-26 13:49:49,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 4342 transitions, 64267 flow [2023-08-26 13:49:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-08-26 13:49:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2023-08-26 13:49:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 8038 transitions. [2023-08-26 13:49:49,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969382716049383 [2023-08-26 13:49:49,461 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 8038 transitions. [2023-08-26 13:49:49,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 8038 transitions. [2023-08-26 13:49:49,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:49:49,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 8038 transitions. [2023-08-26 13:49:49,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 89.31111111111112) internal successors, (8038), 90 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:49,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 225.0) internal successors, (20475), 91 states have internal predecessors, (20475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:49,490 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 225.0) internal successors, (20475), 91 states have internal predecessors, (20475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:49,490 INFO L175 Difference]: Start difference. First operand has 189 places, 1463 transitions, 20632 flow. Second operand 90 states and 8038 transitions. [2023-08-26 13:49:49,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 4342 transitions, 64267 flow [2023-08-26 13:49:58,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 4342 transitions, 61449 flow, removed 1409 selfloop flow, removed 14 redundant places. [2023-08-26 13:49:58,381 INFO L231 Difference]: Finished difference. Result has 318 places, 3146 transitions, 51723 flow [2023-08-26 13:49:58,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=19800, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=933, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=51723, PETRI_PLACES=318, PETRI_TRANSITIONS=3146} [2023-08-26 13:49:58,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2023-08-26 13:49:58,382 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 3146 transitions, 51723 flow [2023-08-26 13:49:58,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 83.55555555555556) internal successors, (2256), 27 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:58,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:49:58,383 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] [2023-08-26 13:49:58,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-26 13:49:58,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 13:49:58,587 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 13:49:58,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:49:58,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1130530414, now seen corresponding path program 1 times [2023-08-26 13:49:58,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:49:58,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83442945] [2023-08-26 13:49:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:49:58,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:49:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:49:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:58,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:49:58,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83442945] [2023-08-26 13:49:58,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83442945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:49:58,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807569734] [2023-08-26 13:49:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:49:58,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:49:58,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:49:58,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:49:58,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 13:49:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:49:58,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 13:49:58,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:49:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:58,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:49:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:58,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807569734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:49:58,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:49:58,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-08-26 13:49:58,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806818418] [2023-08-26 13:49:58,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:49:58,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:49:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:49:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:49:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:49:58,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 225 [2023-08-26 13:49:58,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 3146 transitions, 51723 flow. Second operand has 12 states, 12 states have (on average 94.75) internal successors, (1137), 12 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:58,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:49:58,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 225 [2023-08-26 13:49:58,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:15,255 INFO L124 PetriNetUnfolderBase]: 124922/180489 cut-off events. [2023-08-26 13:51:15,256 INFO L125 PetriNetUnfolderBase]: For 3149156/3149156 co-relation queries the response was YES. [2023-08-26 13:51:18,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1398550 conditions, 180489 events. 124922/180489 cut-off events. For 3149156/3149156 co-relation queries the response was YES. Maximal size of possible extension queue 7260. Compared 1411518 event pairs, 4949 based on Foata normal form. 5324/185813 useless extension candidates. Maximal degree in co-relation 1398433. Up to 34051 conditions per place. [2023-08-26 13:51:19,551 INFO L140 encePairwiseOnDemand]: 215/225 looper letters, 6899 selfloop transitions, 7017 changer transitions 44/13960 dead transitions. [2023-08-26 13:51:19,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 13960 transitions, 255183 flow [2023-08-26 13:51:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 13:51:19,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 13:51:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4097 transitions. [2023-08-26 13:51:19,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441192411924119 [2023-08-26 13:51:19,580 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4097 transitions. [2023-08-26 13:51:19,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4097 transitions. [2023-08-26 13:51:19,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:19,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4097 transitions. [2023-08-26 13:51:19,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 99.92682926829268) internal successors, (4097), 41 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:19,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 225.0) internal successors, (9450), 42 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:19,596 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 225.0) internal successors, (9450), 42 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:19,596 INFO L175 Difference]: Start difference. First operand has 318 places, 3146 transitions, 51723 flow. Second operand 41 states and 4097 transitions. [2023-08-26 13:51:19,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 13960 transitions, 255183 flow [2023-08-26 13:56:40,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 13960 transitions, 251337 flow, removed 1908 selfloop flow, removed 27 redundant places. [2023-08-26 13:56:40,803 INFO L231 Difference]: Finished difference. Result has 343 places, 9260 transitions, 177726 flow [2023-08-26 13:56:40,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=50506, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=177726, PETRI_PLACES=343, PETRI_TRANSITIONS=9260} [2023-08-26 13:56:40,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2023-08-26 13:56:40,806 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 9260 transitions, 177726 flow [2023-08-26 13:56:40,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 94.75) internal successors, (1137), 12 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:56:40,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:56:40,806 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] [2023-08-26 13:56:40,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 13:56:41,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 13:56:41,011 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 13:56:41,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:56:41,011 INFO L85 PathProgramCache]: Analyzing trace with hash -8210880, now seen corresponding path program 2 times [2023-08-26 13:56:41,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:56:41,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747463147] [2023-08-26 13:56:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:56:41,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:56:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:56:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:56:42,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:56:42,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747463147] [2023-08-26 13:56:42,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747463147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:56:42,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741274141] [2023-08-26 13:56:42,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:56:42,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:56:42,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:56:42,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:56:42,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 13:56:42,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:56:42,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:56:42,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-26 13:56:42,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:56:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:56:42,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:56:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:56:44,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741274141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:56:44,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:56:44,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-26 13:56:44,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746092109] [2023-08-26 13:56:44,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:56:44,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 13:56:44,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:56:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 13:56:44,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-08-26 13:56:44,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 225 [2023-08-26 13:56:44,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 9260 transitions, 177726 flow. Second operand has 24 states, 24 states have (on average 88.125) internal successors, (2115), 24 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:56:44,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:56:44,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 225 [2023-08-26 13:56:44,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:01:16,906 INFO L124 PetriNetUnfolderBase]: 165223/239827 cut-off events. [2023-08-26 14:01:16,906 INFO L125 PetriNetUnfolderBase]: For 6881223/6881223 co-relation queries the response was YES. [2023-08-26 14:01:21,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2199450 conditions, 239827 events. 165223/239827 cut-off events. For 6881223/6881223 co-relation queries the response was YES. Maximal size of possible extension queue 9429. Compared 1949697 event pairs, 9905 based on Foata normal form. 147/239974 useless extension candidates. Maximal degree in co-relation 2199321. Up to 99684 conditions per place. [2023-08-26 14:01:22,937 INFO L140 encePairwiseOnDemand]: 216/225 looper letters, 6459 selfloop transitions, 7083 changer transitions 690/14232 dead transitions. [2023-08-26 14:01:22,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 14232 transitions, 296609 flow [2023-08-26 14:01:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-26 14:01:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-26 14:01:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5889 transitions. [2023-08-26 14:01:22,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41544973544973546 [2023-08-26 14:01:22,960 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5889 transitions. [2023-08-26 14:01:22,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5889 transitions. [2023-08-26 14:01:22,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:01:22,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5889 transitions. [2023-08-26 14:01:22,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 93.47619047619048) internal successors, (5889), 63 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:01:22,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 225.0) internal successors, (14400), 64 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:01:22,973 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 225.0) internal successors, (14400), 64 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:01:22,973 INFO L175 Difference]: Start difference. First operand has 343 places, 9260 transitions, 177726 flow. Second operand 63 states and 5889 transitions. [2023-08-26 14:01:22,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 14232 transitions, 296609 flow Received shutdown request... [2023-08-26 14:02:32,423 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 14:02:32,438 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 14:02:33,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 14:02:33,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown