/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:20:32,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:20:32,838 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 20:20:32,843 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:20:32,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:20:32,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:20:32,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:20:32,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:20:32,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:20:32,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:20:32,870 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:20:32,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:20:32,870 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:20:32,871 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:20:32,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:20:32,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:20:32,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:20:32,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:20:32,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:20:32,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:20:32,873 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:20:32,873 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:20:32,873 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:20:32,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:20:32,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:20:32,874 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:20:32,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:20:32,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:32,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:20:32,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:20:32,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:20:32,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:20:32,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:20:32,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:20:32,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:20:32,876 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:20:33,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:20:33,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:20:33,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:20:33,126 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:20:33,127 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:20:33,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-08-26 20:20:34,063 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:20:34,231 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:20:34,231 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-08-26 20:20:34,238 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa47a6130/f7ea11c46ecb46a9892bdd0972f4624d/FLAG15489a4e4 [2023-08-26 20:20:34,248 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa47a6130/f7ea11c46ecb46a9892bdd0972f4624d [2023-08-26 20:20:34,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:20:34,252 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:20:34,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:34,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:20:34,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:20:34,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31427caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34, skipping insertion in model container [2023-08-26 20:20:34,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,271 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:20:34,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:34,400 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:20:34,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:34,429 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:20:34,430 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:20:34,434 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:20:34,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34 WrapperNode [2023-08-26 20:20:34,434 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:34,435 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:34,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:20:34,435 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:20:34,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,451 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,467 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2023-08-26 20:20:34,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:34,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:20:34,468 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:20:34,468 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:20:34,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,498 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,502 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,502 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,503 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:20:34,504 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:20:34,504 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:20:34,504 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:20:34,505 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (1/1) ... [2023-08-26 20:20:34,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:34,527 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 20:20:34,546 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 20:20:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:20:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:20:34,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:20:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:20:34,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:20:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:20:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:20:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:20:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:20:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:20:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:20:34,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:20:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:20:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:20:34,559 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 20:20:34,636 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:20:34,637 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:20:34,767 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:20:34,771 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:20:34,771 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 20:20:34,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:34 BoogieIcfgContainer [2023-08-26 20:20:34,773 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:20:34,775 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:20:34,775 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:20:34,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:20:34,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:20:34" (1/3) ... [2023-08-26 20:20:34,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47499ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:34, skipping insertion in model container [2023-08-26 20:20:34,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:34" (2/3) ... [2023-08-26 20:20:34,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47499ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:34, skipping insertion in model container [2023-08-26 20:20:34,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:34" (3/3) ... [2023-08-26 20:20:34,780 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-08-26 20:20:34,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:20:34,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 20:20:34,791 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:20:34,827 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 20:20:34,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 90 transitions, 196 flow [2023-08-26 20:20:34,874 INFO L124 PetriNetUnfolderBase]: 6/88 cut-off events. [2023-08-26 20:20:34,874 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:20:34,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 88 events. 6/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-26 20:20:34,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 90 transitions, 196 flow [2023-08-26 20:20:34,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 170 flow [2023-08-26 20:20:34,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:20:34,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 79 transitions, 170 flow [2023-08-26 20:20:34,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 79 transitions, 170 flow [2023-08-26 20:20:34,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 170 flow [2023-08-26 20:20:34,903 INFO L124 PetriNetUnfolderBase]: 6/79 cut-off events. [2023-08-26 20:20:34,903 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:20:34,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-26 20:20:34,904 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-26 20:20:36,661 INFO L134 LiptonReduction]: Checked pairs total: 780 [2023-08-26 20:20:36,662 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-26 20:20:36,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:20:36,676 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;@7324bac3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:20:36,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 20:20:36,677 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:20:36,677 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 20:20:36,677 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:36,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:36,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:20:36,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:36,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash 338, now seen corresponding path program 1 times [2023-08-26 20:20:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:36,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929098203] [2023-08-26 20:20:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:36,749 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 20:20:36,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929098203] [2023-08-26 20:20:36,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929098203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:36,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:36,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:20:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182236539] [2023-08-26 20:20:36,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:36,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:20:36,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:36,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:20:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:20:36,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 166 [2023-08-26 20:20:36,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:36,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 166 [2023-08-26 20:20:36,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:36,846 INFO L124 PetriNetUnfolderBase]: 88/151 cut-off events. [2023-08-26 20:20:36,846 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 20:20:36,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 151 events. 88/151 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 387 event pairs, 56 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 252. Up to 152 conditions per place. [2023-08-26 20:20:36,849 INFO L140 encePairwiseOnDemand]: 164/166 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 20:20:36,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 96 flow [2023-08-26 20:20:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:20:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:20:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 185 transitions. [2023-08-26 20:20:36,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572289156626506 [2023-08-26 20:20:36,858 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 185 transitions. [2023-08-26 20:20:36,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 185 transitions. [2023-08-26 20:20:36,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:36,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 185 transitions. [2023-08-26 20:20:36,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.5) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,865 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,866 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 2 states and 185 transitions. [2023-08-26 20:20:36,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 96 flow [2023-08-26 20:20:36,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 20:20:36,869 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-26 20:20:36,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-26 20:20:36,872 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 20:20:36,873 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-26 20:20:36,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:36,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:20:36,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:20:36,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:36,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 331282, now seen corresponding path program 1 times [2023-08-26 20:20:36,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:36,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997162401] [2023-08-26 20:20:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:36,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:36,947 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 20:20:36,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:36,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997162401] [2023-08-26 20:20:36,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997162401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:36,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:36,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:36,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562382426] [2023-08-26 20:20:36,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:36,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:36,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:36,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:36,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:36,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:36,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:36,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:36,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:36,976 INFO L124 PetriNetUnfolderBase]: 82/139 cut-off events. [2023-08-26 20:20:36,977 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:20:36,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 139 events. 82/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 342 event pairs, 52 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 282. Up to 139 conditions per place. [2023-08-26 20:20:36,978 INFO L140 encePairwiseOnDemand]: 163/166 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 20:20:36,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 80 flow [2023-08-26 20:20:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-08-26 20:20:36,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41566265060240964 [2023-08-26 20:20:36,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-08-26 20:20:36,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-08-26 20:20:36,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:36,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-08-26 20:20:36,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,983 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 207 transitions. [2023-08-26 20:20:36,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 80 flow [2023-08-26 20:20:36,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:20:36,983 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-26 20:20:36,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-26 20:20:36,984 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 20:20:36,984 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-26 20:20:36,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:36,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:36,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:20:36,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:20:36,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:36,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash 331283, now seen corresponding path program 1 times [2023-08-26 20:20:36,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:36,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774618556] [2023-08-26 20:20:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:36,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:37,068 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 20:20:37,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:37,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774618556] [2023-08-26 20:20:37,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774618556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:37,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:37,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:37,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382320250] [2023-08-26 20:20:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:37,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:37,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:37,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:37,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:37,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:37,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:37,094 INFO L124 PetriNetUnfolderBase]: 76/127 cut-off events. [2023-08-26 20:20:37,095 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:20:37,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 127 events. 76/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 301 event pairs, 48 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 259. Up to 127 conditions per place. [2023-08-26 20:20:37,095 INFO L140 encePairwiseOnDemand]: 163/166 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 20:20:37,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-08-26 20:20:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-08-26 20:20:37,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42369477911646586 [2023-08-26 20:20:37,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-08-26 20:20:37,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-08-26 20:20:37,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:37,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-08-26 20:20:37,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,103 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 211 transitions. [2023-08-26 20:20:37,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-08-26 20:20:37,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:37,104 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-26 20:20:37,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-26 20:20:37,105 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 20:20:37,105 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-26 20:20:37,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:37,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:20:37,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:20:37,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:37,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 318368389, now seen corresponding path program 1 times [2023-08-26 20:20:37,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:37,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103211330] [2023-08-26 20:20:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:37,196 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 20:20:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103211330] [2023-08-26 20:20:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103211330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:37,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:37,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:20:37,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233603844] [2023-08-26 20:20:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:37,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:20:37,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:37,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:20:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:20:37,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 166 [2023-08-26 20:20:37,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:37,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 166 [2023-08-26 20:20:37,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:37,228 INFO L124 PetriNetUnfolderBase]: 58/100 cut-off events. [2023-08-26 20:20:37,228 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:20:37,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 100 events. 58/100 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 212 event pairs, 36 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 206. Up to 100 conditions per place. [2023-08-26 20:20:37,232 INFO L140 encePairwiseOnDemand]: 164/166 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 20:20:37,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 71 flow [2023-08-26 20:20:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2023-08-26 20:20:37,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3895582329317269 [2023-08-26 20:20:37,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2023-08-26 20:20:37,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2023-08-26 20:20:37,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:37,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2023-08-26 20:20:37,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,238 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 194 transitions. [2023-08-26 20:20:37,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 71 flow [2023-08-26 20:20:37,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:37,239 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-26 20:20:37,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-26 20:20:37,240 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 20:20:37,240 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-26 20:20:37,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:37,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:20:37,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:20:37,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:37,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:37,241 INFO L85 PathProgramCache]: Analyzing trace with hash 318368390, now seen corresponding path program 1 times [2023-08-26 20:20:37,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:37,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375190007] [2023-08-26 20:20:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:37,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:37,365 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 20:20:37,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:37,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375190007] [2023-08-26 20:20:37,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375190007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:37,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:37,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:20:37,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650414358] [2023-08-26 20:20:37,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:37,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:20:37,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:20:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:20:37,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 166 [2023-08-26 20:20:37,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:37,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 166 [2023-08-26 20:20:37,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:37,383 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-08-26 20:20:37,383 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:20:37,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 73 events. 40/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 130 event pairs, 24 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 153. Up to 73 conditions per place. [2023-08-26 20:20:37,384 INFO L140 encePairwiseOnDemand]: 164/166 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 20:20:37,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 68 flow [2023-08-26 20:20:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-26 20:20:37,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39357429718875503 [2023-08-26 20:20:37,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-26 20:20:37,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-26 20:20:37,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:37,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-26 20:20:37,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,387 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 196 transitions. [2023-08-26 20:20:37,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 68 flow [2023-08-26 20:20:37,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:37,387 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 20:20:37,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 20:20:37,388 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 20:20:37,388 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 20:20:37,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:37,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:37,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:20:37,388 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:37,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1665831399, now seen corresponding path program 1 times [2023-08-26 20:20:37,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:37,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715077515] [2023-08-26 20:20:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:37,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:37,592 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 20:20:37,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:37,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715077515] [2023-08-26 20:20:37,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715077515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:37,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:37,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 20:20:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077776518] [2023-08-26 20:20:37,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:37,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 20:20:37,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 20:20:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-26 20:20:37,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-26 20:20:37,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:37,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-26 20:20:37,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:37,731 INFO L124 PetriNetUnfolderBase]: 46/88 cut-off events. [2023-08-26 20:20:37,731 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 20:20:37,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 88 events. 46/88 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 212 event pairs, 1 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 184. Up to 22 conditions per place. [2023-08-26 20:20:37,732 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 29 selfloop transitions, 8 changer transitions 5/42 dead transitions. [2023-08-26 20:20:37,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 183 flow [2023-08-26 20:20:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 428 transitions. [2023-08-26 20:20:37,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683304647160069 [2023-08-26 20:20:37,733 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 428 transitions. [2023-08-26 20:20:37,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 428 transitions. [2023-08-26 20:20:37,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:37,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 428 transitions. [2023-08-26 20:20:37,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.142857142857146) internal successors, (428), 7 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,736 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,736 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 7 states and 428 transitions. [2023-08-26 20:20:37,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 183 flow [2023-08-26 20:20:37,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:37,737 INFO L231 Difference]: Finished difference. Result has 32 places, 21 transitions, 88 flow [2023-08-26 20:20:37,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=21} [2023-08-26 20:20:37,738 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2023-08-26 20:20:37,738 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 21 transitions, 88 flow [2023-08-26 20:20:37,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:37,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:20:37,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:37,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1995086593, now seen corresponding path program 2 times [2023-08-26 20:20:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:37,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104769744] [2023-08-26 20:20:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:37,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:37,979 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 20:20:37,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:37,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104769744] [2023-08-26 20:20:37,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104769744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:37,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:37,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 20:20:37,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15386021] [2023-08-26 20:20:37,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:37,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 20:20:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 20:20:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-26 20:20:37,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-26 20:20:37,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 21 transitions, 88 flow. Second operand has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:37,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:37,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-26 20:20:37,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:38,085 INFO L124 PetriNetUnfolderBase]: 56/104 cut-off events. [2023-08-26 20:20:38,086 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-26 20:20:38,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 104 events. 56/104 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 230 event pairs, 5 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 312. Up to 57 conditions per place. [2023-08-26 20:20:38,087 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 27 selfloop transitions, 12 changer transitions 5/44 dead transitions. [2023-08-26 20:20:38,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 250 flow [2023-08-26 20:20:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 428 transitions. [2023-08-26 20:20:38,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683304647160069 [2023-08-26 20:20:38,088 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 428 transitions. [2023-08-26 20:20:38,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 428 transitions. [2023-08-26 20:20:38,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:38,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 428 transitions. [2023-08-26 20:20:38,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.142857142857146) internal successors, (428), 7 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,091 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,091 INFO L175 Difference]: Start difference. First operand has 32 places, 21 transitions, 88 flow. Second operand 7 states and 428 transitions. [2023-08-26 20:20:38,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 250 flow [2023-08-26 20:20:38,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 240 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 20:20:38,094 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 162 flow [2023-08-26 20:20:38,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-26 20:20:38,096 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 11 predicate places. [2023-08-26 20:20:38,096 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 162 flow [2023-08-26 20:20:38,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:38,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:38,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:20:38,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:38,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash -833557973, now seen corresponding path program 3 times [2023-08-26 20:20:38,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:38,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40401326] [2023-08-26 20:20:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:38,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:38,212 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 20:20:38,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40401326] [2023-08-26 20:20:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40401326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:38,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:38,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:38,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156743920] [2023-08-26 20:20:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:38,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:38,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:38,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:38,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:38,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:38,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:38,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:38,297 INFO L124 PetriNetUnfolderBase]: 62/114 cut-off events. [2023-08-26 20:20:38,297 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-08-26 20:20:38,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 114 events. 62/114 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 276 event pairs, 5 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 417. Up to 66 conditions per place. [2023-08-26 20:20:38,298 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 30 selfloop transitions, 15 changer transitions 5/50 dead transitions. [2023-08-26 20:20:38,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 353 flow [2023-08-26 20:20:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 477 transitions. [2023-08-26 20:20:38,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41049913941480204 [2023-08-26 20:20:38,300 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 477 transitions. [2023-08-26 20:20:38,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 477 transitions. [2023-08-26 20:20:38,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:38,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 477 transitions. [2023-08-26 20:20:38,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.14285714285714) internal successors, (477), 7 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,303 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,303 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 162 flow. Second operand 7 states and 477 transitions. [2023-08-26 20:20:38,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 353 flow [2023-08-26 20:20:38,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 321 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 20:20:38,308 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 228 flow [2023-08-26 20:20:38,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-08-26 20:20:38,310 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2023-08-26 20:20:38,310 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 228 flow [2023-08-26 20:20:38,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:38,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:20:38,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:38,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2012816481, now seen corresponding path program 4 times [2023-08-26 20:20:38,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:38,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796404035] [2023-08-26 20:20:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:38,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:38,436 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 20:20:38,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:38,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796404035] [2023-08-26 20:20:38,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796404035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:38,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:38,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:38,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724255763] [2023-08-26 20:20:38,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:38,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:38,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:38,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:38,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:38,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:38,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:38,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:38,531 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2023-08-26 20:20:38,531 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-26 20:20:38,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 123 events. 67/123 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 307 event pairs, 5 based on Foata normal form. 1/122 useless extension candidates. Maximal degree in co-relation 492. Up to 71 conditions per place. [2023-08-26 20:20:38,532 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 33 selfloop transitions, 15 changer transitions 5/53 dead transitions. [2023-08-26 20:20:38,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 410 flow [2023-08-26 20:20:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 479 transitions. [2023-08-26 20:20:38,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41222030981067126 [2023-08-26 20:20:38,534 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 479 transitions. [2023-08-26 20:20:38,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 479 transitions. [2023-08-26 20:20:38,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:38,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 479 transitions. [2023-08-26 20:20:38,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,537 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,537 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 228 flow. Second operand 7 states and 479 transitions. [2023-08-26 20:20:38,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 410 flow [2023-08-26 20:20:38,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 370 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 20:20:38,539 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 236 flow [2023-08-26 20:20:38,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-26 20:20:38,540 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2023-08-26 20:20:38,540 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 236 flow [2023-08-26 20:20:38,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:38,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:38,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:20:38,540 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:38,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:38,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1917360913, now seen corresponding path program 5 times [2023-08-26 20:20:38,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:38,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731194451] [2023-08-26 20:20:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:38,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:38,627 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 20:20:38,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731194451] [2023-08-26 20:20:38,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731194451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:38,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:38,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:38,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241635886] [2023-08-26 20:20:38,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:38,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:38,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:38,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:38,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:38,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:38,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:38,727 INFO L124 PetriNetUnfolderBase]: 66/124 cut-off events. [2023-08-26 20:20:38,728 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2023-08-26 20:20:38,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 124 events. 66/124 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 314 event pairs, 7 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 510. Up to 76 conditions per place. [2023-08-26 20:20:38,729 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 30 selfloop transitions, 15 changer transitions 5/50 dead transitions. [2023-08-26 20:20:38,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 401 flow [2023-08-26 20:20:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 475 transitions. [2023-08-26 20:20:38,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087779690189329 [2023-08-26 20:20:38,730 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 475 transitions. [2023-08-26 20:20:38,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 475 transitions. [2023-08-26 20:20:38,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:38,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 475 transitions. [2023-08-26 20:20:38,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,746 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,746 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 236 flow. Second operand 7 states and 475 transitions. [2023-08-26 20:20:38,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 401 flow [2023-08-26 20:20:38,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 361 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-26 20:20:38,748 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 242 flow [2023-08-26 20:20:38,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-08-26 20:20:38,749 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-08-26 20:20:38,749 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 242 flow [2023-08-26 20:20:38,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:38,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:38,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:20:38,750 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:38,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash 723323683, now seen corresponding path program 6 times [2023-08-26 20:20:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:38,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736656874] [2023-08-26 20:20:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:38,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:38,845 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 20:20:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736656874] [2023-08-26 20:20:38,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736656874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:38,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:38,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749054685] [2023-08-26 20:20:38,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:38,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:38,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:38,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:38,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 242 flow. Second operand has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:38,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:38,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:38,927 INFO L124 PetriNetUnfolderBase]: 67/127 cut-off events. [2023-08-26 20:20:38,927 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2023-08-26 20:20:38,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 127 events. 67/127 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 329 event pairs, 9 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 516. Up to 59 conditions per place. [2023-08-26 20:20:38,928 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 32 selfloop transitions, 14 changer transitions 5/51 dead transitions. [2023-08-26 20:20:38,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 417 flow [2023-08-26 20:20:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 471 transitions. [2023-08-26 20:20:38,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053356282271945 [2023-08-26 20:20:38,930 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 471 transitions. [2023-08-26 20:20:38,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 471 transitions. [2023-08-26 20:20:38,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:38,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 471 transitions. [2023-08-26 20:20:38,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.28571428571429) internal successors, (471), 7 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,932 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,932 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 242 flow. Second operand 7 states and 471 transitions. [2023-08-26 20:20:38,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 417 flow [2023-08-26 20:20:38,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 379 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-26 20:20:38,934 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 248 flow [2023-08-26 20:20:38,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-26 20:20:38,935 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2023-08-26 20:20:38,935 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 248 flow [2023-08-26 20:20:38,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:38,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 20:20:38,935 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:38,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -17960457, now seen corresponding path program 1 times [2023-08-26 20:20:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326093655] [2023-08-26 20:20:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:38,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:38,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326093655] [2023-08-26 20:20:38,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326093655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:38,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:38,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:38,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640008509] [2023-08-26 20:20:38,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:38,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:38,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:20:38,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:38,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:38,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:38,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:38,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:39,041 INFO L124 PetriNetUnfolderBase]: 104/195 cut-off events. [2023-08-26 20:20:39,041 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2023-08-26 20:20:39,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 195 events. 104/195 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 624 event pairs, 14 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 809. Up to 78 conditions per place. [2023-08-26 20:20:39,042 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 46 selfloop transitions, 22 changer transitions 4/72 dead transitions. [2023-08-26 20:20:39,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 590 flow [2023-08-26 20:20:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 494 transitions. [2023-08-26 20:20:39,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42512908777969016 [2023-08-26 20:20:39,044 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 494 transitions. [2023-08-26 20:20:39,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 494 transitions. [2023-08-26 20:20:39,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:39,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 494 transitions. [2023-08-26 20:20:39,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.57142857142857) internal successors, (494), 7 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,046 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,046 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 248 flow. Second operand 7 states and 494 transitions. [2023-08-26 20:20:39,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 590 flow [2023-08-26 20:20:39,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 522 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-26 20:20:39,049 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 366 flow [2023-08-26 20:20:39,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-08-26 20:20:39,049 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2023-08-26 20:20:39,049 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 366 flow [2023-08-26 20:20:39,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:39,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:39,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 20:20:39,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:39,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:39,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1740610404, now seen corresponding path program 1 times [2023-08-26 20:20:39,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:39,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851609374] [2023-08-26 20:20:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:39,075 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 20:20:39,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:39,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851609374] [2023-08-26 20:20:39,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851609374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:39,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299194453] [2023-08-26 20:20:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:39,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:39,077 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 20:20:39,083 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 20:20:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:39,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:20:39,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:39,179 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 20:20:39,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:39,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299194453] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:39,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 20:20:39,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-08-26 20:20:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770895716] [2023-08-26 20:20:39,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:39,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:39,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:39,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:39,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:39,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:39,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:39,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:39,279 INFO L124 PetriNetUnfolderBase]: 123/242 cut-off events. [2023-08-26 20:20:39,279 INFO L125 PetriNetUnfolderBase]: For 1001/1001 co-relation queries the response was YES. [2023-08-26 20:20:39,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 242 events. 123/242 cut-off events. For 1001/1001 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 866 event pairs, 4 based on Foata normal form. 6/248 useless extension candidates. Maximal degree in co-relation 1083. Up to 125 conditions per place. [2023-08-26 20:20:39,281 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 49 selfloop transitions, 22 changer transitions 0/71 dead transitions. [2023-08-26 20:20:39,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 641 flow [2023-08-26 20:20:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:20:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:20:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2023-08-26 20:20:39,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43614457831325304 [2023-08-26 20:20:39,282 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 362 transitions. [2023-08-26 20:20:39,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 362 transitions. [2023-08-26 20:20:39,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:39,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 362 transitions. [2023-08-26 20:20:39,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,284 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,284 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 366 flow. Second operand 5 states and 362 transitions. [2023-08-26 20:20:39,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 641 flow [2023-08-26 20:20:39,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 613 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-26 20:20:39,288 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 493 flow [2023-08-26 20:20:39,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-26 20:20:39,288 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2023-08-26 20:20:39,288 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 493 flow [2023-08-26 20:20:39,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:39,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:39,297 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 20:20:39,497 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,SelfDestructingSolverStorable12 [2023-08-26 20:20:39,500 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:39,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash 393095176, now seen corresponding path program 2 times [2023-08-26 20:20:39,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:39,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572994032] [2023-08-26 20:20:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:39,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:39,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572994032] [2023-08-26 20:20:39,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572994032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:39,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:39,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:39,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757155562] [2023-08-26 20:20:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:39,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:20:39,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:39,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:39,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:39,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:39,602 INFO L124 PetriNetUnfolderBase]: 117/228 cut-off events. [2023-08-26 20:20:39,603 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2023-08-26 20:20:39,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 228 events. 117/228 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 784 event pairs, 6 based on Foata normal form. 4/232 useless extension candidates. Maximal degree in co-relation 1156. Up to 92 conditions per place. [2023-08-26 20:20:39,604 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 46 selfloop transitions, 19 changer transitions 2/67 dead transitions. [2023-08-26 20:20:39,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 710 flow [2023-08-26 20:20:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:20:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:20:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 424 transitions. [2023-08-26 20:20:39,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42570281124497994 [2023-08-26 20:20:39,605 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 424 transitions. [2023-08-26 20:20:39,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 424 transitions. [2023-08-26 20:20:39,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:39,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 424 transitions. [2023-08-26 20:20:39,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,608 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,608 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 493 flow. Second operand 6 states and 424 transitions. [2023-08-26 20:20:39,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 710 flow [2023-08-26 20:20:39,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 679 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:39,612 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 476 flow [2023-08-26 20:20:39,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=476, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-08-26 20:20:39,612 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2023-08-26 20:20:39,612 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 476 flow [2023-08-26 20:20:39,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:39,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:39,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 20:20:39,613 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:39,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash -857560795, now seen corresponding path program 2 times [2023-08-26 20:20:39,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:39,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807550329] [2023-08-26 20:20:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:39,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:39,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:39,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807550329] [2023-08-26 20:20:39,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807550329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:39,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:39,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:39,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539737243] [2023-08-26 20:20:39,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:39,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:39,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:20:39,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:39,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 476 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:39,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:39,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:39,723 INFO L124 PetriNetUnfolderBase]: 125/254 cut-off events. [2023-08-26 20:20:39,724 INFO L125 PetriNetUnfolderBase]: For 1636/1636 co-relation queries the response was YES. [2023-08-26 20:20:39,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 254 events. 125/254 cut-off events. For 1636/1636 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 948 event pairs, 20 based on Foata normal form. 8/262 useless extension candidates. Maximal degree in co-relation 1298. Up to 108 conditions per place. [2023-08-26 20:20:39,725 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 65 selfloop transitions, 21 changer transitions 1/87 dead transitions. [2023-08-26 20:20:39,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 889 flow [2023-08-26 20:20:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:20:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:20:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 571 transitions. [2023-08-26 20:20:39,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299698795180723 [2023-08-26 20:20:39,727 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 571 transitions. [2023-08-26 20:20:39,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 571 transitions. [2023-08-26 20:20:39,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:39,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 571 transitions. [2023-08-26 20:20:39,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.375) internal successors, (571), 8 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 166.0) internal successors, (1494), 9 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,729 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 166.0) internal successors, (1494), 9 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,729 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 476 flow. Second operand 8 states and 571 transitions. [2023-08-26 20:20:39,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 889 flow [2023-08-26 20:20:39,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 849 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-26 20:20:39,734 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 590 flow [2023-08-26 20:20:39,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=590, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-26 20:20:39,734 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2023-08-26 20:20:39,734 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 590 flow [2023-08-26 20:20:39,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:39,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:39,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 20:20:39,735 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:39,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:39,735 INFO L85 PathProgramCache]: Analyzing trace with hash 937643691, now seen corresponding path program 3 times [2023-08-26 20:20:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:39,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832460374] [2023-08-26 20:20:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:39,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:39,759 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 20:20:39,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:39,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832460374] [2023-08-26 20:20:39,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832460374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:39,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294777703] [2023-08-26 20:20:39,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:20:39,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:39,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:39,760 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 20:20:39,762 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 20:20:39,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 20:20:39,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:20:39,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:20:39,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:39,815 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 20:20:39,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:39,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294777703] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:39,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 20:20:39,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-08-26 20:20:39,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731041082] [2023-08-26 20:20:39,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:39,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:39,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:39,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:39,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 590 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:39,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:39,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:39,908 INFO L124 PetriNetUnfolderBase]: 118/233 cut-off events. [2023-08-26 20:20:39,908 INFO L125 PetriNetUnfolderBase]: For 1562/1562 co-relation queries the response was YES. [2023-08-26 20:20:39,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1279 conditions, 233 events. 118/233 cut-off events. For 1562/1562 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 819 event pairs, 22 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 1256. Up to 128 conditions per place. [2023-08-26 20:20:39,910 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 54 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2023-08-26 20:20:39,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 811 flow [2023-08-26 20:20:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:20:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:20:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 430 transitions. [2023-08-26 20:20:39,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43172690763052207 [2023-08-26 20:20:39,911 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 430 transitions. [2023-08-26 20:20:39,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 430 transitions. [2023-08-26 20:20:39,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:39,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 430 transitions. [2023-08-26 20:20:39,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.66666666666667) internal successors, (430), 6 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,913 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,913 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 590 flow. Second operand 6 states and 430 transitions. [2023-08-26 20:20:39,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 811 flow [2023-08-26 20:20:39,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 776 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 20:20:39,917 INFO L231 Difference]: Finished difference. Result has 76 places, 54 transitions, 592 flow [2023-08-26 20:20:39,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=76, PETRI_TRANSITIONS=54} [2023-08-26 20:20:39,918 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2023-08-26 20:20:39,918 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 54 transitions, 592 flow [2023-08-26 20:20:39,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:39,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:39,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:39,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 20:20:40,126 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,SelfDestructingSolverStorable15 [2023-08-26 20:20:40,127 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:40,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:40,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1751104154, now seen corresponding path program 3 times [2023-08-26 20:20:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221795096] [2023-08-26 20:20:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:40,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:40,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221795096] [2023-08-26 20:20:40,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221795096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:40,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:40,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290884816] [2023-08-26 20:20:40,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:40,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:20:40,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:40,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 54 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:40,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:40,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:40,226 INFO L124 PetriNetUnfolderBase]: 152/303 cut-off events. [2023-08-26 20:20:40,226 INFO L125 PetriNetUnfolderBase]: For 2131/2131 co-relation queries the response was YES. [2023-08-26 20:20:40,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1678 conditions, 303 events. 152/303 cut-off events. For 2131/2131 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1184 event pairs, 26 based on Foata normal form. 2/305 useless extension candidates. Maximal degree in co-relation 1654. Up to 120 conditions per place. [2023-08-26 20:20:40,228 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 54 selfloop transitions, 29 changer transitions 2/85 dead transitions. [2023-08-26 20:20:40,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 1030 flow [2023-08-26 20:20:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 490 transitions. [2023-08-26 20:20:40,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42168674698795183 [2023-08-26 20:20:40,230 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 490 transitions. [2023-08-26 20:20:40,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 490 transitions. [2023-08-26 20:20:40,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:40,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 490 transitions. [2023-08-26 20:20:40,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,232 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,232 INFO L175 Difference]: Start difference. First operand has 76 places, 54 transitions, 592 flow. Second operand 7 states and 490 transitions. [2023-08-26 20:20:40,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 1030 flow [2023-08-26 20:20:40,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 980 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 20:20:40,237 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 792 flow [2023-08-26 20:20:40,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=792, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-08-26 20:20:40,237 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 20:20:40,237 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 792 flow [2023-08-26 20:20:40,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:40,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:40,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 20:20:40,238 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:40,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:40,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2127726375, now seen corresponding path program 4 times [2023-08-26 20:20:40,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:40,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964978286] [2023-08-26 20:20:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:40,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:40,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:40,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964978286] [2023-08-26 20:20:40,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964978286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:40,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:40,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:40,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248770017] [2023-08-26 20:20:40,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:40,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:40,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:40,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:20:40,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:40,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 792 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:40,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:40,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:40,349 INFO L124 PetriNetUnfolderBase]: 140/277 cut-off events. [2023-08-26 20:20:40,349 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-26 20:20:40,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 277 events. 140/277 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1044 event pairs, 10 based on Foata normal form. 4/281 useless extension candidates. Maximal degree in co-relation 1618. Up to 183 conditions per place. [2023-08-26 20:20:40,351 INFO L140 encePairwiseOnDemand]: 161/166 looper letters, 60 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2023-08-26 20:20:40,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 76 transitions, 969 flow [2023-08-26 20:20:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:20:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:20:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2023-08-26 20:20:40,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43012048192771085 [2023-08-26 20:20:40,352 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2023-08-26 20:20:40,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2023-08-26 20:20:40,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:40,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2023-08-26 20:20:40,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,354 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,354 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 792 flow. Second operand 5 states and 357 transitions. [2023-08-26 20:20:40,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 76 transitions, 969 flow [2023-08-26 20:20:40,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 932 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 20:20:40,360 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 766 flow [2023-08-26 20:20:40,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=766, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2023-08-26 20:20:40,360 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 20:20:40,360 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 766 flow [2023-08-26 20:20:40,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:40,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:40,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 20:20:40,361 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:40,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2052029221, now seen corresponding path program 5 times [2023-08-26 20:20:40,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:40,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057107394] [2023-08-26 20:20:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:40,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:40,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057107394] [2023-08-26 20:20:40,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057107394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:40,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:40,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:40,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951501678] [2023-08-26 20:20:40,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:40,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:40,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:40,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:20:40,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:40,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 766 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:40,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:40,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:40,464 INFO L124 PetriNetUnfolderBase]: 126/253 cut-off events. [2023-08-26 20:20:40,464 INFO L125 PetriNetUnfolderBase]: For 1908/1908 co-relation queries the response was YES. [2023-08-26 20:20:40,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1496 conditions, 253 events. 126/253 cut-off events. For 1908/1908 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 930 event pairs, 8 based on Foata normal form. 8/261 useless extension candidates. Maximal degree in co-relation 1472. Up to 106 conditions per place. [2023-08-26 20:20:40,466 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 55 selfloop transitions, 20 changer transitions 2/77 dead transitions. [2023-08-26 20:20:40,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 973 flow [2023-08-26 20:20:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:20:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:20:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 424 transitions. [2023-08-26 20:20:40,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42570281124497994 [2023-08-26 20:20:40,467 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 424 transitions. [2023-08-26 20:20:40,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 424 transitions. [2023-08-26 20:20:40,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:40,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 424 transitions. [2023-08-26 20:20:40,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,469 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,469 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 766 flow. Second operand 6 states and 424 transitions. [2023-08-26 20:20:40,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 973 flow [2023-08-26 20:20:40,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 947 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 20:20:40,474 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 697 flow [2023-08-26 20:20:40,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=697, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2023-08-26 20:20:40,475 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 20:20:40,475 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 697 flow [2023-08-26 20:20:40,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:40,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:40,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 20:20:40,475 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:40,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2084235640, now seen corresponding path program 4 times [2023-08-26 20:20:40,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:40,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714342308] [2023-08-26 20:20:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:40,499 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 20:20:40,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:40,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714342308] [2023-08-26 20:20:40,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714342308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:40,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282207060] [2023-08-26 20:20:40,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:20:40,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:40,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:40,500 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 20:20:40,502 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 20:20:40,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:20:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:20:40,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:20:40,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:40,556 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 20:20:40,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:40,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282207060] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:40,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 20:20:40,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-08-26 20:20:40,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006744183] [2023-08-26 20:20:40,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:40,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:40,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:40,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:40,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:40,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 697 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:40,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:40,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:40,652 INFO L124 PetriNetUnfolderBase]: 116/227 cut-off events. [2023-08-26 20:20:40,652 INFO L125 PetriNetUnfolderBase]: For 1975/1975 co-relation queries the response was YES. [2023-08-26 20:20:40,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 227 events. 116/227 cut-off events. For 1975/1975 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 778 event pairs, 20 based on Foata normal form. 6/233 useless extension candidates. Maximal degree in co-relation 1352. Up to 132 conditions per place. [2023-08-26 20:20:40,654 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 55 selfloop transitions, 25 changer transitions 0/80 dead transitions. [2023-08-26 20:20:40,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 80 transitions, 953 flow [2023-08-26 20:20:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:20:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:20:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2023-08-26 20:20:40,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327309236947791 [2023-08-26 20:20:40,655 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 431 transitions. [2023-08-26 20:20:40,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 431 transitions. [2023-08-26 20:20:40,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:40,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 431 transitions. [2023-08-26 20:20:40,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,657 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,657 INFO L175 Difference]: Start difference. First operand has 82 places, 58 transitions, 697 flow. Second operand 6 states and 431 transitions. [2023-08-26 20:20:40,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 80 transitions, 953 flow [2023-08-26 20:20:40,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 902 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-26 20:20:40,662 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 742 flow [2023-08-26 20:20:40,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=742, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2023-08-26 20:20:40,662 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 20:20:40,662 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 742 flow [2023-08-26 20:20:40,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:40,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:40,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 20:20:40,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:40,869 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:40,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:40,869 INFO L85 PathProgramCache]: Analyzing trace with hash 444806906, now seen corresponding path program 5 times [2023-08-26 20:20:40,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:40,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907963574] [2023-08-26 20:20:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:40,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:20:40,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:40,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907963574] [2023-08-26 20:20:40,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907963574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:40,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:40,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845176193] [2023-08-26 20:20:40,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:40,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:20:40,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:20:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:20:40,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 20:20:40,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 742 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:40,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 20:20:40,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:40,980 INFO L124 PetriNetUnfolderBase]: 112/215 cut-off events. [2023-08-26 20:20:40,980 INFO L125 PetriNetUnfolderBase]: For 1757/1757 co-relation queries the response was YES. [2023-08-26 20:20:40,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 215 events. 112/215 cut-off events. For 1757/1757 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 699 event pairs, 18 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 1327. Up to 92 conditions per place. [2023-08-26 20:20:40,982 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 53 selfloop transitions, 23 changer transitions 1/77 dead transitions. [2023-08-26 20:20:40,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 959 flow [2023-08-26 20:20:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:20:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:20:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 559 transitions. [2023-08-26 20:20:40,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093373493975905 [2023-08-26 20:20:40,983 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 559 transitions. [2023-08-26 20:20:40,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 559 transitions. [2023-08-26 20:20:40,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:40,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 559 transitions. [2023-08-26 20:20:40,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.875) internal successors, (559), 8 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 166.0) internal successors, (1494), 9 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,985 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 166.0) internal successors, (1494), 9 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,985 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 742 flow. Second operand 8 states and 559 transitions. [2023-08-26 20:20:40,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 959 flow [2023-08-26 20:20:40,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 933 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:40,990 INFO L231 Difference]: Finished difference. Result has 87 places, 57 transitions, 720 flow [2023-08-26 20:20:40,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=87, PETRI_TRANSITIONS=57} [2023-08-26 20:20:40,991 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2023-08-26 20:20:40,991 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 57 transitions, 720 flow [2023-08-26 20:20:40,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:40,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:40,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:40,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 20:20:40,991 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:40,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash 115872964, now seen corresponding path program 1 times [2023-08-26 20:20:40,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:40,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569738152] [2023-08-26 20:20:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:40,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:41,080 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 20:20:41,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:41,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569738152] [2023-08-26 20:20:41,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569738152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:41,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444777586] [2023-08-26 20:20:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:41,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:41,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:41,081 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 20:20:41,083 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 20:20:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:41,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:20:41,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:41,213 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 20:20:41,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:41,412 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 20:20:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444777586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:20:41,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:20:41,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 20:20:41,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438904124] [2023-08-26 20:20:41,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:20:41,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:20:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:41,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:20:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:20:41,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:41,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 57 transitions, 720 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:41,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:41,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:41,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:41,696 INFO L124 PetriNetUnfolderBase]: 116/218 cut-off events. [2023-08-26 20:20:41,696 INFO L125 PetriNetUnfolderBase]: For 1797/1797 co-relation queries the response was YES. [2023-08-26 20:20:41,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 218 events. 116/218 cut-off events. For 1797/1797 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 708 event pairs, 2 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 1393. Up to 53 conditions per place. [2023-08-26 20:20:41,697 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 41 selfloop transitions, 21 changer transitions 26/88 dead transitions. [2023-08-26 20:20:41,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 1070 flow [2023-08-26 20:20:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 20:20:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 20:20:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 741 transitions. [2023-08-26 20:20:41,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4058050383351588 [2023-08-26 20:20:41,699 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 741 transitions. [2023-08-26 20:20:41,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 741 transitions. [2023-08-26 20:20:41,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:41,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 741 transitions. [2023-08-26 20:20:41,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.36363636363636) internal successors, (741), 11 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:41,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:41,702 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:41,702 INFO L175 Difference]: Start difference. First operand has 87 places, 57 transitions, 720 flow. Second operand 11 states and 741 transitions. [2023-08-26 20:20:41,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 1070 flow [2023-08-26 20:20:41,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 981 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-26 20:20:41,706 INFO L231 Difference]: Finished difference. Result has 91 places, 46 transitions, 551 flow [2023-08-26 20:20:41,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=551, PETRI_PLACES=91, PETRI_TRANSITIONS=46} [2023-08-26 20:20:41,707 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2023-08-26 20:20:41,707 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 46 transitions, 551 flow [2023-08-26 20:20:41,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:41,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:41,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:41,718 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 20:20:41,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:41,916 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:41,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1063352182, now seen corresponding path program 2 times [2023-08-26 20:20:41,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:41,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265505708] [2023-08-26 20:20:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:42,017 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 20:20:42,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:42,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265505708] [2023-08-26 20:20:42,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265505708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970203181] [2023-08-26 20:20:42,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:20:42,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:42,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:42,020 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 20:20:42,022 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 20:20:42,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:20:42,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:20:42,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:20:42,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:42,136 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 20:20:42,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:42,285 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 20:20:42,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970203181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:20:42,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:20:42,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 20:20:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82970248] [2023-08-26 20:20:42,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:20:42,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:20:42,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:42,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:20:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:20:42,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:42,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 46 transitions, 551 flow. Second operand has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:42,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:42,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:42,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:42,496 INFO L124 PetriNetUnfolderBase]: 90/178 cut-off events. [2023-08-26 20:20:42,496 INFO L125 PetriNetUnfolderBase]: For 1406/1406 co-relation queries the response was YES. [2023-08-26 20:20:42,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 178 events. 90/178 cut-off events. For 1406/1406 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 541 event pairs, 2 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 1083. Up to 55 conditions per place. [2023-08-26 20:20:42,497 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 45 selfloop transitions, 26 changer transitions 9/80 dead transitions. [2023-08-26 20:20:42,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 80 transitions, 930 flow [2023-08-26 20:20:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 20:20:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 20:20:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 740 transitions. [2023-08-26 20:20:42,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40525739320920046 [2023-08-26 20:20:42,499 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 740 transitions. [2023-08-26 20:20:42,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 740 transitions. [2023-08-26 20:20:42,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:42,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 740 transitions. [2023-08-26 20:20:42,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.27272727272727) internal successors, (740), 11 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:42,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:42,502 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:42,502 INFO L175 Difference]: Start difference. First operand has 91 places, 46 transitions, 551 flow. Second operand 11 states and 740 transitions. [2023-08-26 20:20:42,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 80 transitions, 930 flow [2023-08-26 20:20:42,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 808 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-08-26 20:20:42,506 INFO L231 Difference]: Finished difference. Result has 80 places, 49 transitions, 562 flow [2023-08-26 20:20:42,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=562, PETRI_PLACES=80, PETRI_TRANSITIONS=49} [2023-08-26 20:20:42,506 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 52 predicate places. [2023-08-26 20:20:42,506 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 49 transitions, 562 flow [2023-08-26 20:20:42,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:42,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:42,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:42,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 20:20:42,713 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,SelfDestructingSolverStorable22 [2023-08-26 20:20:42,714 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:42,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1141077862, now seen corresponding path program 3 times [2023-08-26 20:20:42,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:42,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672899359] [2023-08-26 20:20:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:42,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:42,813 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 20:20:42,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:42,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672899359] [2023-08-26 20:20:42,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672899359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:42,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953435787] [2023-08-26 20:20:42,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:20:42,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:42,814 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 20:20:42,816 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 20:20:42,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 20:20:42,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:20:42,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:20:42,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:42,935 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 20:20:42,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:43,082 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 20:20:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953435787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:20:43,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:20:43,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 20:20:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969669107] [2023-08-26 20:20:43,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:20:43,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:20:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:20:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:20:43,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:43,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 49 transitions, 562 flow. Second operand has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:43,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:43,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:43,285 INFO L124 PetriNetUnfolderBase]: 84/173 cut-off events. [2023-08-26 20:20:43,285 INFO L125 PetriNetUnfolderBase]: For 927/927 co-relation queries the response was YES. [2023-08-26 20:20:43,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 173 events. 84/173 cut-off events. For 927/927 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 529 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 1009. Up to 55 conditions per place. [2023-08-26 20:20:43,286 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 33 selfloop transitions, 15 changer transitions 26/74 dead transitions. [2023-08-26 20:20:43,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 74 transitions, 835 flow [2023-08-26 20:20:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 20:20:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 20:20:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 734 transitions. [2023-08-26 20:20:43,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019715224534502 [2023-08-26 20:20:43,287 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 734 transitions. [2023-08-26 20:20:43,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 734 transitions. [2023-08-26 20:20:43,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:43,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 734 transitions. [2023-08-26 20:20:43,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 66.72727272727273) internal successors, (734), 11 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,290 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,290 INFO L175 Difference]: Start difference. First operand has 80 places, 49 transitions, 562 flow. Second operand 11 states and 734 transitions. [2023-08-26 20:20:43,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 74 transitions, 835 flow [2023-08-26 20:20:43,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 778 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-26 20:20:43,293 INFO L231 Difference]: Finished difference. Result has 82 places, 37 transitions, 388 flow [2023-08-26 20:20:43,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=82, PETRI_TRANSITIONS=37} [2023-08-26 20:20:43,293 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 20:20:43,294 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 37 transitions, 388 flow [2023-08-26 20:20:43,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:43,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:43,304 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 20:20:43,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:43,499 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:43,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:43,499 INFO L85 PathProgramCache]: Analyzing trace with hash 919791846, now seen corresponding path program 4 times [2023-08-26 20:20:43,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:43,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084137103] [2023-08-26 20:20:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:43,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:43,589 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 20:20:43,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:43,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084137103] [2023-08-26 20:20:43,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084137103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:43,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752857254] [2023-08-26 20:20:43,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:20:43,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:43,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:43,590 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 20:20:43,592 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 20:20:43,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:20:43,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:20:43,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:20:43,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:43,697 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 20:20:43,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:43,892 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 20:20:43,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752857254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:20:43,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:20:43,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-26 20:20:43,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599636117] [2023-08-26 20:20:43,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:20:43,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 20:20:43,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 20:20:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-26 20:20:43,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:43,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 37 transitions, 388 flow. Second operand has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:43,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:43,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:43,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:44,552 INFO L124 PetriNetUnfolderBase]: 81/184 cut-off events. [2023-08-26 20:20:44,553 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2023-08-26 20:20:44,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 184 events. 81/184 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 643 event pairs, 3 based on Foata normal form. 4/188 useless extension candidates. Maximal degree in co-relation 1007. Up to 39 conditions per place. [2023-08-26 20:20:44,554 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 41 selfloop transitions, 29 changer transitions 25/95 dead transitions. [2023-08-26 20:20:44,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 958 flow [2023-08-26 20:20:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 20:20:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 20:20:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1327 transitions. [2023-08-26 20:20:44,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996987951807229 [2023-08-26 20:20:44,556 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1327 transitions. [2023-08-26 20:20:44,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1327 transitions. [2023-08-26 20:20:44,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:44,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1327 transitions. [2023-08-26 20:20:44,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.35) internal successors, (1327), 20 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:44,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 166.0) internal successors, (3486), 21 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:44,560 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 166.0) internal successors, (3486), 21 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:44,561 INFO L175 Difference]: Start difference. First operand has 82 places, 37 transitions, 388 flow. Second operand 20 states and 1327 transitions. [2023-08-26 20:20:44,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 958 flow [2023-08-26 20:20:44,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 848 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-26 20:20:44,564 INFO L231 Difference]: Finished difference. Result has 90 places, 48 transitions, 541 flow [2023-08-26 20:20:44,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=541, PETRI_PLACES=90, PETRI_TRANSITIONS=48} [2023-08-26 20:20:44,564 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2023-08-26 20:20:44,564 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 48 transitions, 541 flow [2023-08-26 20:20:44,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:44,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:44,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:44,577 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 20:20:44,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:44,774 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:44,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash 997517526, now seen corresponding path program 5 times [2023-08-26 20:20:44,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:44,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980203962] [2023-08-26 20:20:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:44,899 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 20:20:44,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:44,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980203962] [2023-08-26 20:20:44,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980203962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:44,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014078768] [2023-08-26 20:20:44,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 20:20:44,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:44,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:44,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:20:44,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 20:20:44,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:20:44,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:20:44,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 20:20:44,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:44,999 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 20:20:44,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:45,074 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 20:20:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014078768] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:20:45,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:20:45,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2023-08-26 20:20:45,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049085859] [2023-08-26 20:20:45,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:20:45,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 20:20:45,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 20:20:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-26 20:20:45,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-26 20:20:45,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 48 transitions, 541 flow. Second operand has 16 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:45,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:45,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-26 20:20:45,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:45,260 INFO L124 PetriNetUnfolderBase]: 67/151 cut-off events. [2023-08-26 20:20:45,261 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2023-08-26 20:20:45,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 151 events. 67/151 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 462 event pairs, 1 based on Foata normal form. 3/154 useless extension candidates. Maximal degree in co-relation 885. Up to 45 conditions per place. [2023-08-26 20:20:45,262 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 33 selfloop transitions, 19 changer transitions 17/69 dead transitions. [2023-08-26 20:20:45,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 69 transitions, 780 flow [2023-08-26 20:20:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 20:20:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 20:20:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 712 transitions. [2023-08-26 20:20:45,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.357429718875502 [2023-08-26 20:20:45,263 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 712 transitions. [2023-08-26 20:20:45,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 712 transitions. [2023-08-26 20:20:45,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:45,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 712 transitions. [2023-08-26 20:20:45,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 59.333333333333336) internal successors, (712), 12 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:45,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 166.0) internal successors, (2158), 13 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:45,266 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 166.0) internal successors, (2158), 13 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:45,266 INFO L175 Difference]: Start difference. First operand has 90 places, 48 transitions, 541 flow. Second operand 12 states and 712 transitions. [2023-08-26 20:20:45,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 69 transitions, 780 flow [2023-08-26 20:20:45,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 69 transitions, 663 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-08-26 20:20:45,270 INFO L231 Difference]: Finished difference. Result has 88 places, 38 transitions, 365 flow [2023-08-26 20:20:45,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=88, PETRI_TRANSITIONS=38} [2023-08-26 20:20:45,270 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2023-08-26 20:20:45,270 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 38 transitions, 365 flow [2023-08-26 20:20:45,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:45,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:45,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:45,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 20:20:45,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 20:20:45,475 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:45,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash -719636888, now seen corresponding path program 6 times [2023-08-26 20:20:45,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:45,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503201690] [2023-08-26 20:20:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:45,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:45,563 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 20:20:45,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:45,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503201690] [2023-08-26 20:20:45,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503201690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:45,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49060902] [2023-08-26 20:20:45,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 20:20:45,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:45,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:45,565 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:20:45,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 20:20:45,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 20:20:45,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:20:45,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:20:45,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:45,656 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 20:20:45,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:45,845 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 20:20:45,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49060902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:20:45,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:20:45,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-26 20:20:45,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902202730] [2023-08-26 20:20:45,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:20:45,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 20:20:45,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 20:20:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-26 20:20:45,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:45,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 38 transitions, 365 flow. Second operand has 15 states, 15 states have (on average 63.53333333333333) internal successors, (953), 15 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:45,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:45,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:45,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:46,212 INFO L124 PetriNetUnfolderBase]: 54/122 cut-off events. [2023-08-26 20:20:46,212 INFO L125 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2023-08-26 20:20:46,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 122 events. 54/122 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 341 event pairs, 1 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 675. Up to 27 conditions per place. [2023-08-26 20:20:46,213 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 31 selfloop transitions, 23 changer transitions 11/65 dead transitions. [2023-08-26 20:20:46,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 65 transitions, 642 flow [2023-08-26 20:20:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 20:20:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 20:20:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 987 transitions. [2023-08-26 20:20:46,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963855421686747 [2023-08-26 20:20:46,214 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 987 transitions. [2023-08-26 20:20:46,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 987 transitions. [2023-08-26 20:20:46,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:46,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 987 transitions. [2023-08-26 20:20:46,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 65.8) internal successors, (987), 15 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:46,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 166.0) internal successors, (2656), 16 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:46,217 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 166.0) internal successors, (2656), 16 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:46,217 INFO L175 Difference]: Start difference. First operand has 88 places, 38 transitions, 365 flow. Second operand 15 states and 987 transitions. [2023-08-26 20:20:46,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 65 transitions, 642 flow [2023-08-26 20:20:46,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 65 transitions, 559 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-08-26 20:20:46,220 INFO L231 Difference]: Finished difference. Result has 82 places, 38 transitions, 360 flow [2023-08-26 20:20:46,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=360, PETRI_PLACES=82, PETRI_TRANSITIONS=38} [2023-08-26 20:20:46,220 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 20:20:46,220 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 38 transitions, 360 flow [2023-08-26 20:20:46,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.53333333333333) internal successors, (953), 15 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:46,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:46,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:46,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 20:20:46,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 20:20:46,425 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:46,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:46,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1440037870, now seen corresponding path program 7 times [2023-08-26 20:20:46,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:46,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918128309] [2023-08-26 20:20:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:46,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:46,546 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 20:20:46,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918128309] [2023-08-26 20:20:46,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918128309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457041607] [2023-08-26 20:20:46,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 20:20:46,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:46,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:46,548 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:20:46,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 20:20:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:46,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:20:46,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:46,667 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 20:20:46,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:46,842 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 20:20:46,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457041607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:20:46,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:20:46,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 20:20:46,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994471153] [2023-08-26 20:20:46,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:20:46,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:20:46,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:46,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:20:46,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:20:46,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 20:20:46,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 38 transitions, 360 flow. Second operand has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:46,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:46,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 20:20:46,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:47,082 INFO L124 PetriNetUnfolderBase]: 52/112 cut-off events. [2023-08-26 20:20:47,082 INFO L125 PetriNetUnfolderBase]: For 477/477 co-relation queries the response was YES. [2023-08-26 20:20:47,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 112 events. 52/112 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 283 event pairs, 3 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 610. Up to 32 conditions per place. [2023-08-26 20:20:47,083 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 25 selfloop transitions, 11 changer transitions 20/56 dead transitions. [2023-08-26 20:20:47,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 56 transitions, 561 flow [2023-08-26 20:20:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 20:20:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 20:20:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 724 transitions. [2023-08-26 20:20:47,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964950711938664 [2023-08-26 20:20:47,084 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 724 transitions. [2023-08-26 20:20:47,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 724 transitions. [2023-08-26 20:20:47,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:47,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 724 transitions. [2023-08-26 20:20:47,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.81818181818181) internal successors, (724), 11 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,087 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,087 INFO L175 Difference]: Start difference. First operand has 82 places, 38 transitions, 360 flow. Second operand 11 states and 724 transitions. [2023-08-26 20:20:47,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 56 transitions, 561 flow [2023-08-26 20:20:47,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 56 transitions, 514 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-08-26 20:20:47,089 INFO L231 Difference]: Finished difference. Result has 83 places, 28 transitions, 251 flow [2023-08-26 20:20:47,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=251, PETRI_PLACES=83, PETRI_TRANSITIONS=28} [2023-08-26 20:20:47,089 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 55 predicate places. [2023-08-26 20:20:47,089 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 28 transitions, 251 flow [2023-08-26 20:20:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:47,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:47,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 20:20:47,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-26 20:20:47,290 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:47,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:47,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1997071242, now seen corresponding path program 8 times [2023-08-26 20:20:47,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:47,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5421315] [2023-08-26 20:20:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:47,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:47,425 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 20:20:47,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5421315] [2023-08-26 20:20:47,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5421315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:20:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521805099] [2023-08-26 20:20:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:20:47,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:20:47,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:47,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:20:47,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 20:20:47,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:20:47,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:20:47,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:20:47,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:20:47,552 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 20:20:47,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:20:47,716 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 20:20:47,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521805099] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:20:47,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:20:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-08-26 20:20:47,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969161188] [2023-08-26 20:20:47,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:20:47,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 20:20:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 20:20:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-08-26 20:20:47,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-26 20:20:47,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 28 transitions, 251 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:47,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-26 20:20:47,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:47,854 INFO L124 PetriNetUnfolderBase]: 34/74 cut-off events. [2023-08-26 20:20:47,854 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2023-08-26 20:20:47,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 74 events. 34/74 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 3 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 393. Up to 23 conditions per place. [2023-08-26 20:20:47,854 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2023-08-26 20:20:47,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 36 transitions, 350 flow [2023-08-26 20:20:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 20:20:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 20:20:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2023-08-26 20:20:47,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507362784471218 [2023-08-26 20:20:47,855 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2023-08-26 20:20:47,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2023-08-26 20:20:47,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:47,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2023-08-26 20:20:47,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,857 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,857 INFO L175 Difference]: Start difference. First operand has 83 places, 28 transitions, 251 flow. Second operand 9 states and 524 transitions. [2023-08-26 20:20:47,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 36 transitions, 350 flow [2023-08-26 20:20:47,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 36 transitions, 305 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-26 20:20:47,859 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-08-26 20:20:47,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-08-26 20:20:47,859 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2023-08-26 20:20:47,859 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-08-26 20:20:47,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:47,861 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 20:20:47,861 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 20:20:47,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 20:20:47,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 20:20:48,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 20:20:48,067 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 5, 5, 1, 1, 1, 1, 1] [2023-08-26 20:20:48,069 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:20:48,069 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:20:48,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:20:48 BasicIcfg [2023-08-26 20:20:48,071 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:20:48,071 INFO L158 Benchmark]: Toolchain (without parser) took 13818.64ms. Allocated memory was 394.3MB in the beginning and 601.9MB in the end (delta: 207.6MB). Free memory was 370.7MB in the beginning and 343.5MB in the end (delta: 27.1MB). Peak memory consumption was 237.3MB. Max. memory is 16.0GB. [2023-08-26 20:20:48,071 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 394.3MB. Free memory was 370.7MB in the beginning and 370.6MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:20:48,071 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.16ms. Allocated memory is still 394.3MB. Free memory was 370.7MB in the beginning and 359.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 20:20:48,071 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.02ms. Allocated memory is still 394.3MB. Free memory was 359.7MB in the beginning and 358.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:20:48,072 INFO L158 Benchmark]: Boogie Preprocessor took 35.57ms. Allocated memory is still 394.3MB. Free memory was 358.1MB in the beginning and 357.1MB in the end (delta: 935.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:20:48,072 INFO L158 Benchmark]: RCFGBuilder took 269.44ms. Allocated memory is still 394.3MB. Free memory was 356.7MB in the beginning and 343.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 20:20:48,072 INFO L158 Benchmark]: TraceAbstraction took 13295.95ms. Allocated memory was 394.3MB in the beginning and 601.9MB in the end (delta: 207.6MB). Free memory was 343.0MB in the beginning and 343.5MB in the end (delta: -522.5kB). Peak memory consumption was 210.0MB. Max. memory is 16.0GB. [2023-08-26 20:20:48,073 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 394.3MB. Free memory was 370.7MB in the beginning and 370.6MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 180.16ms. Allocated memory is still 394.3MB. Free memory was 370.7MB in the beginning and 359.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.02ms. Allocated memory is still 394.3MB. Free memory was 359.7MB in the beginning and 358.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.57ms. Allocated memory is still 394.3MB. Free memory was 358.1MB in the beginning and 357.1MB in the end (delta: 935.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 269.44ms. Allocated memory is still 394.3MB. Free memory was 356.7MB in the beginning and 343.8MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 13295.95ms. Allocated memory was 394.3MB in the beginning and 601.9MB in the end (delta: 207.6MB). Free memory was 343.0MB in the beginning and 343.5MB in the end (delta: -522.5kB). Peak memory consumption was 210.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 80 PlacesBefore, 28 PlacesAfterwards, 79 TransitionsBefore, 23 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 76 TotalNumberOfCompositions, 780 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 764, independent: 752, independent conditional: 0, independent unconditional: 752, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 381, independent: 379, independent conditional: 0, independent unconditional: 379, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 764, independent: 373, independent conditional: 0, independent unconditional: 373, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 381, unknown conditional: 0, unknown unconditional: 381] , Statistics on independence cache: Total cache size (in pairs): 29, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 107 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.2s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 864 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 864 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 158 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4522 IncrementalHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 158 mSolverCounterUnsat, 0 mSDtfsCounter, 4522 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 561 GetRequests, 243 SyntacticMatches, 27 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=792occurred in iteration=17, InterpolantAutomatonStates: 220, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 517 NumberOfCodeBlocks, 517 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 628 ConstructedInterpolants, 0 QuantifiedInterpolants, 3864 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1443 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 51 InterpolantComputations, 21 PerfectInterpolantSequences, 11/64 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 20:20:48,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...