/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/parallel-misc-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:51:19,769 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:51:19,857 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 19:51:19,862 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:51:19,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:51:19,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:51:19,894 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:51:19,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:51:19,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:51:19,898 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:51:19,898 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:51:19,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:51:19,899 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:51:19,900 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:51:19,900 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:51:19,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:51:19,901 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:51:19,901 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:51:19,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:51:19,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:51:19,901 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:51:19,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:51:19,902 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:51:19,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:51:19,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:51:19,903 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:51:19,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:51:19,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:51:19,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:51:19,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:51:19,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:51:19,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:51:19,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:51:19,906 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:51:19,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:51:19,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:51:20,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:51:20,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:51:20,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:51:20,217 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:51:20,218 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:51:20,219 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2023-08-26 19:51:21,444 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:51:21,689 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:51:21,690 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2023-08-26 19:51:21,697 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6645c4cc/6278516719524cc2a8960a8434753a4e/FLAGdfd1a9cd2 [2023-08-26 19:51:21,712 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6645c4cc/6278516719524cc2a8960a8434753a4e [2023-08-26 19:51:21,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:51:21,718 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:51:21,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:51:21,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:51:21,724 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:51:21,724 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:21,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165bb0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21, skipping insertion in model container [2023-08-26 19:51:21,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:21,747 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:51:21,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:51:21,931 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:51:21,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:51:21,971 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:51:21,972 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:51:21,984 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:51:21,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21 WrapperNode [2023-08-26 19:51:21,984 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:51:21,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:51:21,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:51:21,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:51:21,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,025 INFO L138 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2023-08-26 19:51:22,026 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:51:22,026 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:51:22,027 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:51:22,027 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:51:22,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,036 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,037 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,040 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,047 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,051 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:51:22,052 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:51:22,052 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:51:22,052 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:51:22,053 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (1/1) ... [2023-08-26 19:51:22,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:51:22,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:22,086 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 19:51:22,108 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 19:51:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:51:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 19:51:22,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 19:51:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 19:51:22,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 19:51:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:51:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:51:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:51:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 19:51:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 19:51:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:51:22,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:51:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:51:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:51:22,124 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 19:51:22,221 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:51:22,223 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:51:22,429 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:51:22,449 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:51:22,449 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 19:51:22,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:51:22 BoogieIcfgContainer [2023-08-26 19:51:22,452 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:51:22,454 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:51:22,454 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:51:22,457 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:51:22,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:51:21" (1/3) ... [2023-08-26 19:51:22,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3ed439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:51:22, skipping insertion in model container [2023-08-26 19:51:22,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:21" (2/3) ... [2023-08-26 19:51:22,459 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3ed439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:51:22, skipping insertion in model container [2023-08-26 19:51:22,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:51:22" (3/3) ... [2023-08-26 19:51:22,460 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2023-08-26 19:51:22,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:51:22,483 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 19:51:22,483 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:51:22,554 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 19:51:22,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 101 transitions, 218 flow [2023-08-26 19:51:22,625 INFO L124 PetriNetUnfolderBase]: 11/99 cut-off events. [2023-08-26 19:51:22,625 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:22,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 11/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-08-26 19:51:22,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 101 transitions, 218 flow [2023-08-26 19:51:22,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 90 transitions, 192 flow [2023-08-26 19:51:22,643 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:51:22,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 192 flow [2023-08-26 19:51:22,655 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 90 transitions, 192 flow [2023-08-26 19:51:22,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 192 flow [2023-08-26 19:51:22,688 INFO L124 PetriNetUnfolderBase]: 11/90 cut-off events. [2023-08-26 19:51:22,688 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:22,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 11/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 129 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-08-26 19:51:22,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 1476 [2023-08-26 19:51:25,673 INFO L134 LiptonReduction]: Checked pairs total: 1468 [2023-08-26 19:51:25,673 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-26 19:51:25,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:51:25,691 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;@2393f891, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:51:25,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 19:51:25,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:51:25,692 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 19:51:25,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:25,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:25,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 19:51:25,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:25,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash 421, now seen corresponding path program 1 times [2023-08-26 19:51:25,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:25,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221094871] [2023-08-26 19:51:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:25,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:25,775 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 19:51:25,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221094871] [2023-08-26 19:51:25,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221094871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:25,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:25,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 19:51:25,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250323924] [2023-08-26 19:51:25,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:25,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 19:51:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 19:51:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 19:51:25,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 198 [2023-08-26 19:51:25,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 54 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:25,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 198 [2023-08-26 19:51:25,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:25,881 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-26 19:51:25,881 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 19:51:25,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 80 events. 45/80 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 124. Up to 81 conditions per place. [2023-08-26 19:51:25,884 INFO L140 encePairwiseOnDemand]: 196/198 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-26 19:51:25,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 88 flow [2023-08-26 19:51:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 19:51:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 19:51:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 203 transitions. [2023-08-26 19:51:25,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2023-08-26 19:51:25,896 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 203 transitions. [2023-08-26 19:51:25,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 203 transitions. [2023-08-26 19:51:25,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:25,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 203 transitions. [2023-08-26 19:51:25,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.5) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,908 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,910 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 54 flow. Second operand 2 states and 203 transitions. [2023-08-26 19:51:25,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 88 flow [2023-08-26 19:51:25,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 19:51:25,915 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 42 flow [2023-08-26 19:51:25,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-08-26 19:51:25,920 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 19:51:25,921 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 42 flow [2023-08-26 19:51:25,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:25,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:51:25,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:51:25,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:25,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:25,923 INFO L85 PathProgramCache]: Analyzing trace with hash 413044, now seen corresponding path program 1 times [2023-08-26 19:51:25,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:25,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154212739] [2023-08-26 19:51:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:25,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:26,162 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 19:51:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154212739] [2023-08-26 19:51:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154212739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:26,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219967362] [2023-08-26 19:51:26,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:26,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:26,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 198 [2023-08-26 19:51:26,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:26,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 198 [2023-08-26 19:51:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:26,210 INFO L124 PetriNetUnfolderBase]: 41/72 cut-off events. [2023-08-26 19:51:26,210 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:51:26,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 72 events. 41/72 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 134 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 147. Up to 72 conditions per place. [2023-08-26 19:51:26,211 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 19:51:26,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 72 flow [2023-08-26 19:51:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-26 19:51:26,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057239057239057 [2023-08-26 19:51:26,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-26 19:51:26,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-26 19:51:26,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:26,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-26 19:51:26,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 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 19:51:26,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,224 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 42 flow. Second operand 3 states and 241 transitions. [2023-08-26 19:51:26,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 72 flow [2023-08-26 19:51:26,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:51:26,225 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 40 flow [2023-08-26 19:51:26,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=40, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-26 19:51:26,227 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 19:51:26,229 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 40 flow [2023-08-26 19:51:26,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:26,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:51:26,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 19:51:26,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:26,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash 413045, now seen corresponding path program 1 times [2023-08-26 19:51:26,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:26,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259464199] [2023-08-26 19:51:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:26,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:26,300 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 19:51:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:26,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259464199] [2023-08-26 19:51:26,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259464199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:26,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979909270] [2023-08-26 19:51:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:26,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:26,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 198 [2023-08-26 19:51:26,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:26,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 198 [2023-08-26 19:51:26,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:26,338 INFO L124 PetriNetUnfolderBase]: 37/64 cut-off events. [2023-08-26 19:51:26,338 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:51:26,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 64 events. 37/64 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 111 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 132. Up to 64 conditions per place. [2023-08-26 19:51:26,339 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 19:51:26,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 19:51:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-26 19:51:26,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39225589225589225 [2023-08-26 19:51:26,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-26 19:51:26,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-26 19:51:26,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:26,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-26 19:51:26,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,343 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 40 flow. Second operand 3 states and 233 transitions. [2023-08-26 19:51:26,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 19:51:26,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 65 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:26,344 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 37 flow [2023-08-26 19:51:26,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=37, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-08-26 19:51:26,344 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 19:51:26,345 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 37 flow [2023-08-26 19:51:26,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:26,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:51:26,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:51:26,345 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 19:51:26,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash 396943662, now seen corresponding path program 1 times [2023-08-26 19:51:26,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:26,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905692069] [2023-08-26 19:51:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:26,439 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 19:51:26,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905692069] [2023-08-26 19:51:26,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905692069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:26,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:26,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:26,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510116701] [2023-08-26 19:51:26,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:26,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:51:26,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 198 [2023-08-26 19:51:26,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 37 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:26,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 198 [2023-08-26 19:51:26,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:26,473 INFO L124 PetriNetUnfolderBase]: 29/52 cut-off events. [2023-08-26 19:51:26,474 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:51:26,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 52 events. 29/52 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 77 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 109. Up to 52 conditions per place. [2023-08-26 19:51:26,475 INFO L140 encePairwiseOnDemand]: 196/198 looper letters, 13 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2023-08-26 19:51:26,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 63 flow [2023-08-26 19:51:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-26 19:51:26,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2023-08-26 19:51:26,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-26 19:51:26,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-26 19:51:26,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:26,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-26 19:51:26,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,480 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 37 flow. Second operand 3 states and 222 transitions. [2023-08-26 19:51:26,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 63 flow [2023-08-26 19:51:26,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:26,481 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-26 19:51:26,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-26 19:51:26,482 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 19:51:26,482 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-26 19:51:26,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:26,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:51:26,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 19:51:26,483 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 19:51:26,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:26,484 INFO L85 PathProgramCache]: Analyzing trace with hash 396943663, now seen corresponding path program 1 times [2023-08-26 19:51:26,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:26,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801336393] [2023-08-26 19:51:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:26,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:26,599 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 19:51:26,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:26,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801336393] [2023-08-26 19:51:26,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801336393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:26,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:26,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077607801] [2023-08-26 19:51:26,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:26,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:51:26,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 198 [2023-08-26 19:51:26,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:26,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 198 [2023-08-26 19:51:26,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:26,638 INFO L124 PetriNetUnfolderBase]: 21/40 cut-off events. [2023-08-26 19:51:26,639 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:51:26,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 40 events. 21/40 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 86. Up to 40 conditions per place. [2023-08-26 19:51:26,639 INFO L140 encePairwiseOnDemand]: 196/198 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 19:51:26,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 60 flow [2023-08-26 19:51:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-08-26 19:51:26,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771043771043771 [2023-08-26 19:51:26,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-08-26 19:51:26,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-08-26 19:51:26,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:26,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-08-26 19:51:26,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,648 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 3 states and 224 transitions. [2023-08-26 19:51:26,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 60 flow [2023-08-26 19:51:26,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 59 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:26,649 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 35 flow [2023-08-26 19:51:26,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=35, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-08-26 19:51:26,650 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 19:51:26,650 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 35 flow [2023-08-26 19:51:26,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:26,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:26,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:51:26,651 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 19:51:26,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1644074393, now seen corresponding path program 1 times [2023-08-26 19:51:26,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:26,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810885541] [2023-08-26 19:51:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:26,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:26,719 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 19:51:26,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:26,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810885541] [2023-08-26 19:51:26,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810885541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:26,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:26,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162990531] [2023-08-26 19:51:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:26,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:26,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:26,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:26,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:26,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 198 [2023-08-26 19:51:26,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 35 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:26,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 198 [2023-08-26 19:51:26,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:26,759 INFO L124 PetriNetUnfolderBase]: 29/54 cut-off events. [2023-08-26 19:51:26,760 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:26,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 54 events. 29/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 94 event pairs, 1 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 116. Up to 45 conditions per place. [2023-08-26 19:51:26,762 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 17 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 19:51:26,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 86 flow [2023-08-26 19:51:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 19:51:26,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2023-08-26 19:51:26,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 19:51:26,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 19:51:26,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:26,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 19:51:26,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,767 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 35 flow. Second operand 3 states and 278 transitions. [2023-08-26 19:51:26,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 86 flow [2023-08-26 19:51:26,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 85 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:26,768 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 46 flow [2023-08-26 19:51:26,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-08-26 19:51:26,771 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2023-08-26 19:51:26,773 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 46 flow [2023-08-26 19:51:26,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:26,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:26,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 19:51:26,775 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 19:51:26,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2111598268, now seen corresponding path program 1 times [2023-08-26 19:51:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:26,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971551648] [2023-08-26 19:51:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:26,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:26,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971551648] [2023-08-26 19:51:26,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971551648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:26,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:26,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:26,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580754807] [2023-08-26 19:51:26,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:26,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:26,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:26,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:26,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 198 [2023-08-26 19:51:26,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 14 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:26,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 198 [2023-08-26 19:51:26,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:26,883 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-08-26 19:51:26,883 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 19:51:26,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 73 events. 40/73 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 133 event pairs, 6 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 187. Up to 49 conditions per place. [2023-08-26 19:51:26,885 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-26 19:51:26,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 110 flow [2023-08-26 19:51:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 19:51:26,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2023-08-26 19:51:26,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 19:51:26,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 19:51:26,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:26,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 19:51:26,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,889 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,889 INFO L175 Difference]: Start difference. First operand has 22 places, 14 transitions, 46 flow. Second operand 3 states and 278 transitions. [2023-08-26 19:51:26,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 110 flow [2023-08-26 19:51:26,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:26,891 INFO L231 Difference]: Finished difference. Result has 24 places, 15 transitions, 56 flow [2023-08-26 19:51:26,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=15} [2023-08-26 19:51:26,892 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-08-26 19:51:26,892 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 15 transitions, 56 flow [2023-08-26 19:51:26,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:26,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:26,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 19:51:26,893 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 19:51:26,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:26,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1376920364, now seen corresponding path program 1 times [2023-08-26 19:51:26,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:26,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231118556] [2023-08-26 19:51:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:27,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231118556] [2023-08-26 19:51:27,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231118556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498420771] [2023-08-26 19:51:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:27,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:27,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:27,067 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 19:51:27,069 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 19:51:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:27,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:51:27,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:27,313 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 19:51:27,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:27,649 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 19:51:27,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498420771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:27,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:27,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2023-08-26 19:51:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147636458] [2023-08-26 19:51:27,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:27,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:51:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:27,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:51:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:51:27,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 198 [2023-08-26 19:51:27,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 56 flow. Second operand has 10 states, 10 states have (on average 70.5) internal successors, (705), 10 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:27,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:27,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 198 [2023-08-26 19:51:27,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:27,821 INFO L124 PetriNetUnfolderBase]: 75/134 cut-off events. [2023-08-26 19:51:27,821 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-26 19:51:27,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 134 events. 75/134 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 381. Up to 53 conditions per place. [2023-08-26 19:51:27,822 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 44 selfloop transitions, 23 changer transitions 0/67 dead transitions. [2023-08-26 19:51:27,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 67 transitions, 353 flow [2023-08-26 19:51:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 19:51:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 19:51:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1080 transitions. [2023-08-26 19:51:27,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2023-08-26 19:51:27,826 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1080 transitions. [2023-08-26 19:51:27,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1080 transitions. [2023-08-26 19:51:27,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:27,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1080 transitions. [2023-08-26 19:51:27,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.0) internal successors, (1080), 15 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 19:51:27,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:27,833 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:27,834 INFO L175 Difference]: Start difference. First operand has 24 places, 15 transitions, 56 flow. Second operand 15 states and 1080 transitions. [2023-08-26 19:51:27,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 67 transitions, 353 flow [2023-08-26 19:51:27,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 67 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:27,838 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 235 flow [2023-08-26 19:51:27,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=235, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-26 19:51:27,840 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-26 19:51:27,840 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 235 flow [2023-08-26 19:51:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 70.5) internal successors, (705), 10 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:27,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:27,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:27,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 19:51:28,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:28,047 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 19:51:28,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1410832779, now seen corresponding path program 2 times [2023-08-26 19:51:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:28,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105143669] [2023-08-26 19:51:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:28,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:28,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105143669] [2023-08-26 19:51:28,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105143669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:28,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766988225] [2023-08-26 19:51:28,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:51:28,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:28,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:28,665 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 19:51:28,692 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 19:51:28,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:51:28,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:28,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 19:51:28,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:28,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:29,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766988225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:29,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:29,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-26 19:51:29,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138095545] [2023-08-26 19:51:29,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:29,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 19:51:29,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:29,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 19:51:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-08-26 19:51:29,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 19:51:29,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 235 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:29,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:29,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 19:51:29,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:30,725 INFO L124 PetriNetUnfolderBase]: 268/495 cut-off events. [2023-08-26 19:51:30,725 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2023-08-26 19:51:30,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2136 conditions, 495 events. 268/495 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2125 event pairs, 2 based on Foata normal form. 8/467 useless extension candidates. Maximal degree in co-relation 2125. Up to 187 conditions per place. [2023-08-26 19:51:30,729 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 85 selfloop transitions, 92 changer transitions 40/217 dead transitions. [2023-08-26 19:51:30,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 217 transitions, 1722 flow [2023-08-26 19:51:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-26 19:51:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-26 19:51:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2069 transitions. [2023-08-26 19:51:30,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3483164983164983 [2023-08-26 19:51:30,736 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2069 transitions. [2023-08-26 19:51:30,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2069 transitions. [2023-08-26 19:51:30,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:30,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2069 transitions. [2023-08-26 19:51:30,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 68.96666666666667) internal successors, (2069), 30 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:30,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 198.0) internal successors, (6138), 31 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:30,750 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 198.0) internal successors, (6138), 31 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:30,750 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 235 flow. Second operand 30 states and 2069 transitions. [2023-08-26 19:51:30,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 217 transitions, 1722 flow [2023-08-26 19:51:30,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 217 transitions, 1512 flow, removed 95 selfloop flow, removed 3 redundant places. [2023-08-26 19:51:30,761 INFO L231 Difference]: Finished difference. Result has 75 places, 112 transitions, 995 flow [2023-08-26 19:51:30,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=995, PETRI_PLACES=75, PETRI_TRANSITIONS=112} [2023-08-26 19:51:30,762 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2023-08-26 19:51:30,762 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 112 transitions, 995 flow [2023-08-26 19:51:30,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:30,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:30,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:30,772 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 19:51:30,969 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,SelfDestructingSolverStorable8 [2023-08-26 19:51:30,969 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 19:51:30,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:30,970 INFO L85 PathProgramCache]: Analyzing trace with hash -252928693, now seen corresponding path program 3 times [2023-08-26 19:51:30,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:30,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173389657] [2023-08-26 19:51:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:30,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:31,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:31,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173389657] [2023-08-26 19:51:31,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173389657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:31,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770623055] [2023-08-26 19:51:31,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:51:31,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:31,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:31,497 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 19:51:31,500 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 19:51:31,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 19:51:31,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:31,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 19:51:31,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:31,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:32,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770623055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:32,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:32,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-26 19:51:32,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796789696] [2023-08-26 19:51:32,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:32,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 19:51:32,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:32,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 19:51:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-26 19:51:32,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 19:51:32,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 112 transitions, 995 flow. Second operand has 17 states, 17 states have (on average 65.17647058823529) internal successors, (1108), 17 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:32,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:32,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 19:51:32,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:34,964 INFO L124 PetriNetUnfolderBase]: 968/1630 cut-off events. [2023-08-26 19:51:34,964 INFO L125 PetriNetUnfolderBase]: For 4190/4190 co-relation queries the response was YES. [2023-08-26 19:51:34,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7704 conditions, 1630 events. 968/1630 cut-off events. For 4190/4190 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8341 event pairs, 6 based on Foata normal form. 27/1545 useless extension candidates. Maximal degree in co-relation 7687. Up to 487 conditions per place. [2023-08-26 19:51:34,980 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 164 selfloop transitions, 354 changer transitions 60/578 dead transitions. [2023-08-26 19:51:34,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 578 transitions, 5995 flow [2023-08-26 19:51:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-26 19:51:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-26 19:51:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3097 transitions. [2023-08-26 19:51:34,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34758698092031426 [2023-08-26 19:51:34,991 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3097 transitions. [2023-08-26 19:51:34,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3097 transitions. [2023-08-26 19:51:34,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:34,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3097 transitions. [2023-08-26 19:51:35,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 68.82222222222222) internal successors, (3097), 45 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:35,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 198.0) internal successors, (9108), 46 states have internal predecessors, (9108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:35,016 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 198.0) internal successors, (9108), 46 states have internal predecessors, (9108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:35,016 INFO L175 Difference]: Start difference. First operand has 75 places, 112 transitions, 995 flow. Second operand 45 states and 3097 transitions. [2023-08-26 19:51:35,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 578 transitions, 5995 flow [2023-08-26 19:51:35,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 578 transitions, 4312 flow, removed 831 selfloop flow, removed 7 redundant places. [2023-08-26 19:51:35,068 INFO L231 Difference]: Finished difference. Result has 125 places, 427 transitions, 3691 flow [2023-08-26 19:51:35,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3691, PETRI_PLACES=125, PETRI_TRANSITIONS=427} [2023-08-26 19:51:35,069 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 99 predicate places. [2023-08-26 19:51:35,069 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 427 transitions, 3691 flow [2023-08-26 19:51:35,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.17647058823529) internal successors, (1108), 17 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:35,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:35,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:35,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 19:51:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:35,277 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 19:51:35,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1714856237, now seen corresponding path program 4 times [2023-08-26 19:51:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111855395] [2023-08-26 19:51:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:35,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111855395] [2023-08-26 19:51:35,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111855395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:35,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125713459] [2023-08-26 19:51:35,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:51:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:35,839 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 19:51:35,842 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 19:51:35,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:51:35,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:35,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 19:51:35,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:36,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:36,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125713459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:36,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:36,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-26 19:51:36,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693807527] [2023-08-26 19:51:36,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:36,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 19:51:36,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 19:51:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-08-26 19:51:36,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 19:51:36,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 427 transitions, 3691 flow. Second operand has 17 states, 17 states have (on average 64.82352941176471) internal successors, (1102), 17 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:36,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:36,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 19:51:36,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:37,711 INFO L124 PetriNetUnfolderBase]: 1132/1852 cut-off events. [2023-08-26 19:51:37,712 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2023-08-26 19:51:37,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8733 conditions, 1852 events. 1132/1852 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9201 event pairs, 50 based on Foata normal form. 15/1765 useless extension candidates. Maximal degree in co-relation 8703. Up to 785 conditions per place. [2023-08-26 19:51:37,732 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 239 selfloop transitions, 404 changer transitions 18/661 dead transitions. [2023-08-26 19:51:37,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 661 transitions, 6788 flow [2023-08-26 19:51:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 19:51:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 19:51:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1498 transitions. [2023-08-26 19:51:37,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34389348025711663 [2023-08-26 19:51:37,736 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1498 transitions. [2023-08-26 19:51:37,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1498 transitions. [2023-08-26 19:51:37,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:37,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1498 transitions. [2023-08-26 19:51:37,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 68.0909090909091) internal successors, (1498), 22 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:37,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 198.0) internal successors, (4554), 23 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:37,751 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 198.0) internal successors, (4554), 23 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:37,751 INFO L175 Difference]: Start difference. First operand has 125 places, 427 transitions, 3691 flow. Second operand 22 states and 1498 transitions. [2023-08-26 19:51:37,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 661 transitions, 6788 flow [2023-08-26 19:51:37,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 661 transitions, 6129 flow, removed 328 selfloop flow, removed 4 redundant places. [2023-08-26 19:51:37,814 INFO L231 Difference]: Finished difference. Result has 149 places, 597 transitions, 5935 flow [2023-08-26 19:51:37,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5935, PETRI_PLACES=149, PETRI_TRANSITIONS=597} [2023-08-26 19:51:37,815 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2023-08-26 19:51:37,816 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 597 transitions, 5935 flow [2023-08-26 19:51:37,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.82352941176471) internal successors, (1102), 17 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:37,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:37,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:37,827 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 19:51:38,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:38,022 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 19:51:38,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1516804811, now seen corresponding path program 5 times [2023-08-26 19:51:38,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:38,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464246948] [2023-08-26 19:51:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:38,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:38,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464246948] [2023-08-26 19:51:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464246948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393944472] [2023-08-26 19:51:38,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:51:38,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:38,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:38,625 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 19:51:38,669 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 19:51:38,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 19:51:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:38,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 19:51:38,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:38,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:39,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393944472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:39,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:39,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-26 19:51:39,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927382971] [2023-08-26 19:51:39,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:39,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:51:39,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:51:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:51:39,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 19:51:39,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 597 transitions, 5935 flow. Second operand has 19 states, 19 states have (on average 64.94736842105263) internal successors, (1234), 19 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:39,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:39,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 19:51:39,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:43,275 INFO L124 PetriNetUnfolderBase]: 1826/3002 cut-off events. [2023-08-26 19:51:43,275 INFO L125 PetriNetUnfolderBase]: For 6480/6480 co-relation queries the response was YES. [2023-08-26 19:51:43,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15497 conditions, 3002 events. 1826/3002 cut-off events. For 6480/6480 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 17111 event pairs, 30 based on Foata normal form. 34/2960 useless extension candidates. Maximal degree in co-relation 15460. Up to 733 conditions per place. [2023-08-26 19:51:43,304 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 184 selfloop transitions, 656 changer transitions 257/1097 dead transitions. [2023-08-26 19:51:43,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1097 transitions, 12403 flow [2023-08-26 19:51:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 19:51:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 19:51:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2774 transitions. [2023-08-26 19:51:43,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34170978073417096 [2023-08-26 19:51:43,312 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2774 transitions. [2023-08-26 19:51:43,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2774 transitions. [2023-08-26 19:51:43,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:43,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2774 transitions. [2023-08-26 19:51:43,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 67.65853658536585) internal successors, (2774), 41 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:43,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 198.0) internal successors, (8316), 42 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:43,328 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 198.0) internal successors, (8316), 42 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:43,328 INFO L175 Difference]: Start difference. First operand has 149 places, 597 transitions, 5935 flow. Second operand 41 states and 2774 transitions. [2023-08-26 19:51:43,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1097 transitions, 12403 flow [2023-08-26 19:51:43,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1097 transitions, 12119 flow, removed 106 selfloop flow, removed 7 redundant places. [2023-08-26 19:51:43,483 INFO L231 Difference]: Finished difference. Result has 199 places, 763 transitions, 9562 flow [2023-08-26 19:51:43,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=9562, PETRI_PLACES=199, PETRI_TRANSITIONS=763} [2023-08-26 19:51:43,484 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 173 predicate places. [2023-08-26 19:51:43,484 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 763 transitions, 9562 flow [2023-08-26 19:51:43,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.94736842105263) internal successors, (1234), 19 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:43,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:43,485 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:43,496 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 19:51:43,691 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,SelfDestructingSolverStorable11 [2023-08-26 19:51:43,691 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 19:51:43,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash -335700746, now seen corresponding path program 6 times [2023-08-26 19:51:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:43,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351955958] [2023-08-26 19:51:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:44,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351955958] [2023-08-26 19:51:44,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351955958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104347123] [2023-08-26 19:51:44,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:51:44,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:44,180 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 19:51:44,192 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 19:51:44,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 19:51:44,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:44,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 19:51:44,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:44,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:44,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104347123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:44,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:44,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2023-08-26 19:51:44,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957616715] [2023-08-26 19:51:44,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:44,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:51:44,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:44,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:51:44,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:51:44,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 198 [2023-08-26 19:51:44,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 763 transitions, 9562 flow. Second operand has 18 states, 18 states have (on average 69.11111111111111) internal successors, (1244), 18 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:44,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:44,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 198 [2023-08-26 19:51:44,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:45,536 INFO L124 PetriNetUnfolderBase]: 1163/1970 cut-off events. [2023-08-26 19:51:45,537 INFO L125 PetriNetUnfolderBase]: For 7146/7146 co-relation queries the response was YES. [2023-08-26 19:51:45,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12064 conditions, 1970 events. 1163/1970 cut-off events. For 7146/7146 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10687 event pairs, 24 based on Foata normal form. 168/2138 useless extension candidates. Maximal degree in co-relation 12011. Up to 441 conditions per place. [2023-08-26 19:51:45,561 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 279 selfloop transitions, 390 changer transitions 9/678 dead transitions. [2023-08-26 19:51:45,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 678 transitions, 9445 flow [2023-08-26 19:51:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 19:51:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 19:51:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 996 transitions. [2023-08-26 19:51:45,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2023-08-26 19:51:45,563 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 996 transitions. [2023-08-26 19:51:45,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 996 transitions. [2023-08-26 19:51:45,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:45,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 996 transitions. [2023-08-26 19:51:45,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.14285714285714) internal successors, (996), 14 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 19:51:45,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:45,569 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:45,569 INFO L175 Difference]: Start difference. First operand has 199 places, 763 transitions, 9562 flow. Second operand 14 states and 996 transitions. [2023-08-26 19:51:45,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 678 transitions, 9445 flow [2023-08-26 19:51:45,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 678 transitions, 8809 flow, removed 148 selfloop flow, removed 25 redundant places. [2023-08-26 19:51:45,702 INFO L231 Difference]: Finished difference. Result has 177 places, 650 transitions, 8166 flow [2023-08-26 19:51:45,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=7312, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8166, PETRI_PLACES=177, PETRI_TRANSITIONS=650} [2023-08-26 19:51:45,703 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 151 predicate places. [2023-08-26 19:51:45,703 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 650 transitions, 8166 flow [2023-08-26 19:51:45,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 69.11111111111111) internal successors, (1244), 18 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:45,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:45,704 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:45,714 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 19:51:45,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:45,910 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 19:51:45,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1809637067, now seen corresponding path program 7 times [2023-08-26 19:51:45,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:45,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356697619] [2023-08-26 19:51:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:45,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:46,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356697619] [2023-08-26 19:51:46,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356697619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679760556] [2023-08-26 19:51:46,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:51:46,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:46,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:46,341 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 19:51:46,368 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 19:51:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:46,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:51:46,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:46,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:46,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679760556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:46,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:46,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-26 19:51:46,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63433584] [2023-08-26 19:51:46,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:46,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 19:51:46,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 19:51:46,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-26 19:51:46,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 198 [2023-08-26 19:51:46,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 650 transitions, 8166 flow. Second operand has 15 states, 15 states have (on average 69.6) internal successors, (1044), 15 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:46,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:46,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 198 [2023-08-26 19:51:46,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:47,240 INFO L124 PetriNetUnfolderBase]: 868/1481 cut-off events. [2023-08-26 19:51:47,241 INFO L125 PetriNetUnfolderBase]: For 5825/5825 co-relation queries the response was YES. [2023-08-26 19:51:47,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 1481 events. 868/1481 cut-off events. For 5825/5825 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7637 event pairs, 14 based on Foata normal form. 172/1653 useless extension candidates. Maximal degree in co-relation 8439. Up to 449 conditions per place. [2023-08-26 19:51:47,255 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 187 selfloop transitions, 261 changer transitions 40/488 dead transitions. [2023-08-26 19:51:47,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 488 transitions, 6572 flow [2023-08-26 19:51:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:51:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:51:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 711 transitions. [2023-08-26 19:51:47,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2023-08-26 19:51:47,257 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 711 transitions. [2023-08-26 19:51:47,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 711 transitions. [2023-08-26 19:51:47,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:47,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 711 transitions. [2023-08-26 19:51:47,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 71.1) internal successors, (711), 10 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:47,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 198.0) internal successors, (2178), 11 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:47,262 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 198.0) internal successors, (2178), 11 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:47,262 INFO L175 Difference]: Start difference. First operand has 177 places, 650 transitions, 8166 flow. Second operand 10 states and 711 transitions. [2023-08-26 19:51:47,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 488 transitions, 6572 flow [2023-08-26 19:51:47,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 488 transitions, 5354 flow, removed 59 selfloop flow, removed 23 redundant places. [2023-08-26 19:51:47,333 INFO L231 Difference]: Finished difference. Result has 156 places, 437 transitions, 4476 flow [2023-08-26 19:51:47,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4476, PETRI_PLACES=156, PETRI_TRANSITIONS=437} [2023-08-26 19:51:47,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 130 predicate places. [2023-08-26 19:51:47,334 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 437 transitions, 4476 flow [2023-08-26 19:51:47,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.6) internal successors, (1044), 15 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:47,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:47,335 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:47,341 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 19:51:47,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:47,541 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 19:51:47,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash 702172175, now seen corresponding path program 8 times [2023-08-26 19:51:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:47,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777610424] [2023-08-26 19:51:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:47,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:48,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:48,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777610424] [2023-08-26 19:51:48,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777610424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:48,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786907755] [2023-08-26 19:51:48,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:51:48,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:48,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:48,391 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 19:51:48,392 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 19:51:48,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:51:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:48,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 19:51:48,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:48,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:49,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786907755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:49,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:49,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-08-26 19:51:49,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924013936] [2023-08-26 19:51:49,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:49,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 19:51:49,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:49,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 19:51:49,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2023-08-26 19:51:49,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 19:51:49,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 437 transitions, 4476 flow. Second operand has 25 states, 25 states have (on average 64.88) internal successors, (1622), 25 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:49,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:49,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 19:51:49,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:50,916 INFO L124 PetriNetUnfolderBase]: 1015/1723 cut-off events. [2023-08-26 19:51:50,916 INFO L125 PetriNetUnfolderBase]: For 3380/3380 co-relation queries the response was YES. [2023-08-26 19:51:50,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9120 conditions, 1723 events. 1015/1723 cut-off events. For 3380/3380 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 9125 event pairs, 10 based on Foata normal form. 8/1729 useless extension candidates. Maximal degree in co-relation 9096. Up to 499 conditions per place. [2023-08-26 19:51:50,925 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 0 selfloop transitions, 0 changer transitions 610/610 dead transitions. [2023-08-26 19:51:50,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 610 transitions, 7193 flow [2023-08-26 19:51:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 19:51:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 19:51:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1546 transitions. [2023-08-26 19:51:50,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.339481774264383 [2023-08-26 19:51:50,928 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1546 transitions. [2023-08-26 19:51:50,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1546 transitions. [2023-08-26 19:51:50,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:50,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1546 transitions. [2023-08-26 19:51:50,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.21739130434783) internal successors, (1546), 23 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:50,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 198.0) internal successors, (4752), 24 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:50,935 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 198.0) internal successors, (4752), 24 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:50,935 INFO L175 Difference]: Start difference. First operand has 156 places, 437 transitions, 4476 flow. Second operand 23 states and 1546 transitions. [2023-08-26 19:51:50,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 610 transitions, 7193 flow [2023-08-26 19:51:50,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 610 transitions, 6620 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-08-26 19:51:50,984 INFO L231 Difference]: Finished difference. Result has 160 places, 0 transitions, 0 flow [2023-08-26 19:51:50,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=4022, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=160, PETRI_TRANSITIONS=0} [2023-08-26 19:51:50,984 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2023-08-26 19:51:50,985 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 0 transitions, 0 flow [2023-08-26 19:51:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.88) internal successors, (1622), 25 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:50,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 19:51:50,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 19:51:50,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 19:51:50,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 19:51:50,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 19:51:50,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 19:51:50,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 19:51:50,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 19:51:50,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 19:51:50,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 19:51:50,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 19:51:50,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-26 19:51:51,193 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,SelfDestructingSolverStorable14 [2023-08-26 19:51:51,193 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:51,196 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 19:51:51,196 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 19:51:51,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:51:51 BasicIcfg [2023-08-26 19:51:51,198 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 19:51:51,198 INFO L158 Benchmark]: Toolchain (without parser) took 29479.83ms. Allocated memory was 348.1MB in the beginning and 725.6MB in the end (delta: 377.5MB). Free memory was 323.6MB in the beginning and 313.0MB in the end (delta: 10.6MB). Peak memory consumption was 392.3MB. Max. memory is 16.0GB. [2023-08-26 19:51:51,198 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 348.1MB. Free memory was 325.5MB in the beginning and 325.4MB in the end (delta: 94.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 19:51:51,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.71ms. Allocated memory is still 348.1MB. Free memory was 323.6MB in the beginning and 312.5MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 19:51:51,199 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.47ms. Allocated memory is still 348.1MB. Free memory was 312.5MB in the beginning and 311.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 19:51:51,199 INFO L158 Benchmark]: Boogie Preprocessor took 24.69ms. Allocated memory is still 348.1MB. Free memory was 311.2MB in the beginning and 309.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 19:51:51,199 INFO L158 Benchmark]: RCFGBuilder took 399.96ms. Allocated memory is still 348.1MB. Free memory was 309.8MB in the beginning and 294.2MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 19:51:51,199 INFO L158 Benchmark]: TraceAbstraction took 28743.90ms. Allocated memory was 348.1MB in the beginning and 725.6MB in the end (delta: 377.5MB). Free memory was 293.7MB in the beginning and 313.0MB in the end (delta: -19.3MB). Peak memory consumption was 360.9MB. Max. memory is 16.0GB. [2023-08-26 19:51:51,200 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 348.1MB. Free memory was 325.5MB in the beginning and 325.4MB in the end (delta: 94.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 263.71ms. Allocated memory is still 348.1MB. Free memory was 323.6MB in the beginning and 312.5MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.47ms. Allocated memory is still 348.1MB. Free memory was 312.5MB in the beginning and 311.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 24.69ms. Allocated memory is still 348.1MB. Free memory was 311.2MB in the beginning and 309.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 399.96ms. Allocated memory is still 348.1MB. Free memory was 309.8MB in the beginning and 294.2MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 28743.90ms. Allocated memory was 348.1MB in the beginning and 725.6MB in the end (delta: 377.5MB). Free memory was 293.7MB in the beginning and 313.0MB in the end (delta: -19.3MB). Peak memory consumption was 360.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 86 PlacesBefore, 26 PlacesAfterwards, 90 TransitionsBefore, 21 TransitionsAfterwards, 1476 CoEnabledTransitionPairs, 5 FixpointIterations, 37 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 97 TotalNumberOfCompositions, 1468 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1397, independent: 1390, independent conditional: 0, independent unconditional: 1390, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 758, independent: 754, independent conditional: 0, independent unconditional: 754, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1397, independent: 636, independent conditional: 0, independent unconditional: 636, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 758, unknown conditional: 0, unknown unconditional: 758] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, 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, 121 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: 28.6s, OverallIterations: 15, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 13.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1104 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1104 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 380 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2999 IncrementalHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 380 mSolverCounterUnsat, 0 mSDtfsCounter, 2999 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 436 GetRequests, 142 SyntacticMatches, 12 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9562occurred in iteration=12, 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, 0.5s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 284 NumberOfCodeBlocks, 284 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 375 ConstructedInterpolants, 0 QuantifiedInterpolants, 4559 SizeOfPredicates, 52 NumberOfNonLiveVariables, 1010 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 31 InterpolantComputations, 7 PerfectInterpolantSequences, 16/172 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 19:51:51,223 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...