/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 -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:44:19,634 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:44:19,710 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 [2023-08-24 14:44:19,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:44:19,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:44:19,749 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:44:19,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:44:19,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:44:19,755 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:44:19,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:44:19,759 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:44:19,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:44:19,759 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:44:19,760 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:44:19,761 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:44:19,761 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:44:19,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:44:19,761 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:44:19,761 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:44:19,762 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:44:19,762 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:44:19,763 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:44:19,763 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:44:19,763 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:44:19,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:44:19,764 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:44:19,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:44:19,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:44:19,764 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:44:19,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:44:19,765 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:44:19,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:44:19,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:44:19,766 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:44:19,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:44:19,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:44:20,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:44:20,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:44:20,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:44:20,094 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:44:20,095 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:44:20,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-24 14:44:21,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:44:21,489 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:44:21,489 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-24 14:44:21,496 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca965bb6/75df6529514f49cd9776148b22feda63/FLAGdb9ba9911 [2023-08-24 14:44:21,506 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca965bb6/75df6529514f49cd9776148b22feda63 [2023-08-24 14:44:21,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:44:21,508 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:44:21,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:44:21,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:44:21,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:44:21,512 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,513 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c10eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21, skipping insertion in model container [2023-08-24 14:44:21,513 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,536 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:44:21,673 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-24 14:44:21,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:44:21,687 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:44:21,711 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-24 14:44:21,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:44:21,723 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:44:21,723 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:44:21,729 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:44:21,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21 WrapperNode [2023-08-24 14:44:21,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:44:21,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:44:21,731 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:44:21,731 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:44:21,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,794 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 332 [2023-08-24 14:44:21,794 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:44:21,795 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:44:21,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:44:21,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:44:21,803 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,819 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,819 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,850 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:44:21,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:44:21,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:44:21,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:44:21,851 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (1/1) ... [2023-08-24 14:44:21,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:44:21,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:44:21,898 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) [2023-08-24 14:44:21,918 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 [2023-08-24 14:44:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:44:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:44:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:44:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:44:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:44:21,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:44:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:44:21,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:44:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 14:44:21,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 14:44:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-24 14:44:21,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-24 14:44:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:44:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:44:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:44:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 14:44:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:44:21,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:44:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:44:21,939 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 14:44:22,068 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:44:22,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:44:22,476 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:44:22,659 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:44:22,659 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 14:44:22,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:44:22 BoogieIcfgContainer [2023-08-24 14:44:22,661 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:44:22,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:44:22,663 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:44:22,665 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:44:22,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:44:21" (1/3) ... [2023-08-24 14:44:22,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a1b121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:44:22, skipping insertion in model container [2023-08-24 14:44:22,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:44:21" (2/3) ... [2023-08-24 14:44:22,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a1b121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:44:22, skipping insertion in model container [2023-08-24 14:44:22,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:44:22" (3/3) ... [2023-08-24 14:44:22,668 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-08-24 14:44:22,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:44:22,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:44:22,685 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:44:22,781 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 14:44:22,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 241 transitions, 514 flow [2023-08-24 14:44:22,926 INFO L124 PetriNetUnfolderBase]: 19/237 cut-off events. [2023-08-24 14:44:22,926 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 14:44:22,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 237 events. 19/237 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 121 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-08-24 14:44:22,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 241 transitions, 514 flow [2023-08-24 14:44:22,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 225 transitions, 474 flow [2023-08-24 14:44:22,944 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:44:22,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 225 transitions, 474 flow [2023-08-24 14:44:22,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 225 transitions, 474 flow [2023-08-24 14:44:22,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 225 transitions, 474 flow [2023-08-24 14:44:23,027 INFO L124 PetriNetUnfolderBase]: 19/225 cut-off events. [2023-08-24 14:44:23,027 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 14:44:23,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 225 events. 19/225 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-08-24 14:44:23,031 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-08-24 14:44:31,403 INFO L134 LiptonReduction]: Checked pairs total: 4193 [2023-08-24 14:44:31,404 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-24 14:44:31,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:44:31,419 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;@edfe576, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:44:31,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 14:44:31,426 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:44:31,426 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-08-24 14:44:31,426 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 14:44:31,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:44:31,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:44:31,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:44:31,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:44:31,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1585291686, now seen corresponding path program 1 times [2023-08-24 14:44:31,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:44:31,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593672111] [2023-08-24 14:44:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:44:31,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:44:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:44:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:44:32,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:44:32,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593672111] [2023-08-24 14:44:32,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593672111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:44:32,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:44:32,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:44:32,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911022275] [2023-08-24 14:44:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:44:32,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:44:32,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:44:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:44:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:44:32,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 460 [2023-08-24 14:44:32,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:32,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:44:32,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 460 [2023-08-24 14:44:32,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:44:32,944 INFO L124 PetriNetUnfolderBase]: 4116/5443 cut-off events. [2023-08-24 14:44:32,944 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2023-08-24 14:44:32,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11309 conditions, 5443 events. 4116/5443 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25218 event pairs, 578 based on Foata normal form. 0/4060 useless extension candidates. Maximal degree in co-relation 9951. Up to 2391 conditions per place. [2023-08-24 14:44:33,021 INFO L140 encePairwiseOnDemand]: 454/460 looper letters, 75 selfloop transitions, 6 changer transitions 8/92 dead transitions. [2023-08-24 14:44:33,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 92 transitions, 419 flow [2023-08-24 14:44:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:44:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:44:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1309 transitions. [2023-08-24 14:44:33,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742753623188406 [2023-08-24 14:44:33,036 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1309 transitions. [2023-08-24 14:44:33,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1309 transitions. [2023-08-24 14:44:33,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:44:33,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1309 transitions. [2023-08-24 14:44:33,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.16666666666666) internal successors, (1309), 6 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,058 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,059 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 6 states and 1309 transitions. [2023-08-24 14:44:33,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 92 transitions, 419 flow [2023-08-24 14:44:33,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 92 transitions, 381 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 14:44:33,078 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 121 flow [2023-08-24 14:44:33,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-24 14:44:33,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-24 14:44:33,083 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 121 flow [2023-08-24 14:44:33,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:44:33,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:44:33,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:44:33,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:44:33,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:44:33,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1968561096, now seen corresponding path program 1 times [2023-08-24 14:44:33,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:44:33,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810787652] [2023-08-24 14:44:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:44:33,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:44:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:44:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:44:33,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:44:33,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810787652] [2023-08-24 14:44:33,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810787652] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:44:33,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:44:33,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:44:33,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335637482] [2023-08-24 14:44:33,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:44:33,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:44:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:44:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:44:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:44:33,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 460 [2023-08-24 14:44:33,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:44:33,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 460 [2023-08-24 14:44:33,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:44:33,726 INFO L124 PetriNetUnfolderBase]: 3465/4770 cut-off events. [2023-08-24 14:44:33,727 INFO L125 PetriNetUnfolderBase]: For 1772/2004 co-relation queries the response was YES. [2023-08-24 14:44:33,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 4770 events. 3465/4770 cut-off events. For 1772/2004 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23697 event pairs, 2333 based on Foata normal form. 324/3918 useless extension candidates. Maximal degree in co-relation 6367. Up to 4194 conditions per place. [2023-08-24 14:44:33,757 INFO L140 encePairwiseOnDemand]: 455/460 looper letters, 32 selfloop transitions, 2 changer transitions 21/63 dead transitions. [2023-08-24 14:44:33,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 284 flow [2023-08-24 14:44:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:44:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:44:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-08-24 14:44:33,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342391304347826 [2023-08-24 14:44:33,761 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-08-24 14:44:33,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-08-24 14:44:33,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:44:33,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-08-24 14:44:33,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,769 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,769 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 121 flow. Second operand 4 states and 799 transitions. [2023-08-24 14:44:33,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 284 flow [2023-08-24 14:44:33,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:44:33,774 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2023-08-24 14:44:33,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-24 14:44:33,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-24 14:44:33,779 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2023-08-24 14:44:33,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.25) internal successors, (769), 4 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:33,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:44:33,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:44:33,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:44:33,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:44:33,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:44:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash 303485013, now seen corresponding path program 1 times [2023-08-24 14:44:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:44:33,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4405004] [2023-08-24 14:44:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:44:33,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:44:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:44:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:44:34,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:44:34,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4405004] [2023-08-24 14:44:34,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4405004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:44:34,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358889655] [2023-08-24 14:44:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:44:34,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:44:34,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:44:34,105 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) [2023-08-24 14:44:34,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 14:44:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:44:34,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 14:44:34,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:44:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:44:34,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:44:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:44:34,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358889655] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:44:34,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:44:34,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2023-08-24 14:44:34,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479986973] [2023-08-24 14:44:34,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:44:34,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:44:34,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:44:34,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:44:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-24 14:44:34,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 460 [2023-08-24 14:44:34,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 201.66666666666666) internal successors, (1210), 6 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:34,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:44:34,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 460 [2023-08-24 14:44:34,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:44:35,590 INFO L124 PetriNetUnfolderBase]: 7268/9574 cut-off events. [2023-08-24 14:44:35,590 INFO L125 PetriNetUnfolderBase]: For 2979/2979 co-relation queries the response was YES. [2023-08-24 14:44:35,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23697 conditions, 9574 events. 7268/9574 cut-off events. For 2979/2979 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 48184 event pairs, 157 based on Foata normal form. 126/8020 useless extension candidates. Maximal degree in co-relation 23682. Up to 2518 conditions per place. [2023-08-24 14:44:35,660 INFO L140 encePairwiseOnDemand]: 452/460 looper letters, 104 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2023-08-24 14:44:35,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 120 transitions, 590 flow [2023-08-24 14:44:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 14:44:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 14:44:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1488 transitions. [2023-08-24 14:44:35,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462111801242236 [2023-08-24 14:44:35,665 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1488 transitions. [2023-08-24 14:44:35,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1488 transitions. [2023-08-24 14:44:35,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:44:35,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1488 transitions. [2023-08-24 14:44:35,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 212.57142857142858) internal successors, (1488), 7 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:35,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 460.0) internal successors, (3680), 8 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:35,677 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 460.0) internal successors, (3680), 8 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:35,677 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 7 states and 1488 transitions. [2023-08-24 14:44:35,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 120 transitions, 590 flow [2023-08-24 14:44:35,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 120 transitions, 586 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 14:44:35,685 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 229 flow [2023-08-24 14:44:35,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=229, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-08-24 14:44:35,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-08-24 14:44:35,686 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 229 flow [2023-08-24 14:44:35,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 201.66666666666666) internal successors, (1210), 6 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:35,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:44:35,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:44:35,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 14:44:35,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:44:35,887 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:44:35,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:44:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash -230930442, now seen corresponding path program 1 times [2023-08-24 14:44:35,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:44:35,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201695402] [2023-08-24 14:44:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:44:35,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:44:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:44:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:44:36,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:44:36,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201695402] [2023-08-24 14:44:36,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201695402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:44:36,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469160366] [2023-08-24 14:44:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:44:36,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:44:36,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:44:36,701 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) [2023-08-24 14:44:36,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 14:44:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:44:36,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 14:44:36,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:44:36,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 14:44:37,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:44:37,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:44:37,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:44:37,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 14:44:37,356 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-24 14:44:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:44:37,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:44:38,006 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:44:38,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 61 [2023-08-24 14:44:38,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1267 treesize of output 1235 [2023-08-24 14:44:38,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 607 treesize of output 559 [2023-08-24 14:44:38,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 559 treesize of output 535 [2023-08-24 14:44:38,089 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 261 [2023-08-24 14:44:38,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 523 treesize of output 427 [2023-08-24 14:44:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:44:38,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469160366] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:44:38,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:44:38,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2023-08-24 14:44:38,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372740888] [2023-08-24 14:44:38,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:44:38,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 14:44:38,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:44:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 14:44:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=424, Unknown=10, NotChecked=0, Total=552 [2023-08-24 14:44:38,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 460 [2023-08-24 14:44:38,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 229 flow. Second operand has 24 states, 24 states have (on average 147.70833333333334) internal successors, (3545), 24 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:38,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:44:38,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 460 [2023-08-24 14:44:38,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:44:40,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 14:44:45,345 INFO L124 PetriNetUnfolderBase]: 22771/29961 cut-off events. [2023-08-24 14:44:45,346 INFO L125 PetriNetUnfolderBase]: For 38219/38458 co-relation queries the response was YES. [2023-08-24 14:44:45,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87690 conditions, 29961 events. 22771/29961 cut-off events. For 38219/38458 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 166122 event pairs, 3847 based on Foata normal form. 335/24651 useless extension candidates. Maximal degree in co-relation 46560. Up to 12523 conditions per place. [2023-08-24 14:44:45,545 INFO L140 encePairwiseOnDemand]: 448/460 looper letters, 225 selfloop transitions, 61 changer transitions 26/317 dead transitions. [2023-08-24 14:44:45,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 317 transitions, 1928 flow [2023-08-24 14:44:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 14:44:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 14:44:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3746 transitions. [2023-08-24 14:44:45,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3393115942028985 [2023-08-24 14:44:45,558 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3746 transitions. [2023-08-24 14:44:45,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3746 transitions. [2023-08-24 14:44:45,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:44:45,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3746 transitions. [2023-08-24 14:44:45,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 156.08333333333334) internal successors, (3746), 24 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:45,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 460.0) internal successors, (11500), 25 states have internal predecessors, (11500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:45,586 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 460.0) internal successors, (11500), 25 states have internal predecessors, (11500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:45,586 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 229 flow. Second operand 24 states and 3746 transitions. [2023-08-24 14:44:45,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 317 transitions, 1928 flow [2023-08-24 14:44:45,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 317 transitions, 1869 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-24 14:44:45,671 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 770 flow [2023-08-24 14:44:45,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=770, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2023-08-24 14:44:45,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2023-08-24 14:44:45,672 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 770 flow [2023-08-24 14:44:45,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 147.70833333333334) internal successors, (3545), 24 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:45,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:44:45,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:44:45,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 14:44:45,879 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,SelfDestructingSolverStorable3 [2023-08-24 14:44:45,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:44:45,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:44:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash -990199483, now seen corresponding path program 2 times [2023-08-24 14:44:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:44:45,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602582134] [2023-08-24 14:44:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:44:45,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:44:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:44:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:44:47,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:44:47,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602582134] [2023-08-24 14:44:47,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602582134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:44:47,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095768378] [2023-08-24 14:44:47,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:44:47,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:44:47,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:44:47,921 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) [2023-08-24 14:44:47,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 14:44:48,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:44:48,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:44:48,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 14:44:48,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:44:48,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:44:48,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 14:44:48,325 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-24 14:44:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:44:48,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:44:48,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:44:48,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-24 14:44:48,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-24 14:44:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:44:48,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095768378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:44:48,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:44:48,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2023-08-24 14:44:48,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135456104] [2023-08-24 14:44:48,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:44:48,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 14:44:48,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:44:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 14:44:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=398, Unknown=5, NotChecked=0, Total=462 [2023-08-24 14:44:48,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 460 [2023-08-24 14:44:48,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 770 flow. Second operand has 22 states, 22 states have (on average 150.6818181818182) internal successors, (3315), 22 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:48,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:44:48,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 460 [2023-08-24 14:44:48,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:44:53,994 INFO L124 PetriNetUnfolderBase]: 37842/49789 cut-off events. [2023-08-24 14:44:53,994 INFO L125 PetriNetUnfolderBase]: For 99747/100057 co-relation queries the response was YES. [2023-08-24 14:44:54,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161686 conditions, 49789 events. 37842/49789 cut-off events. For 99747/100057 co-relation queries the response was YES. Maximal size of possible extension queue 2352. Compared 294169 event pairs, 4546 based on Foata normal form. 680/45205 useless extension candidates. Maximal degree in co-relation 139920. Up to 18427 conditions per place. [2023-08-24 14:44:54,408 INFO L140 encePairwiseOnDemand]: 450/460 looper letters, 166 selfloop transitions, 84 changer transitions 11/266 dead transitions. [2023-08-24 14:44:54,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 266 transitions, 2035 flow [2023-08-24 14:44:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 14:44:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 14:44:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2085 transitions. [2023-08-24 14:44:54,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3486622073578595 [2023-08-24 14:44:54,414 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2085 transitions. [2023-08-24 14:44:54,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2085 transitions. [2023-08-24 14:44:54,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:44:54,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2085 transitions. [2023-08-24 14:44:54,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 160.3846153846154) internal successors, (2085), 13 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:54,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 460.0) internal successors, (6440), 14 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:54,429 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 460.0) internal successors, (6440), 14 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:54,430 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 770 flow. Second operand 13 states and 2085 transitions. [2023-08-24 14:44:54,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 266 transitions, 2035 flow [2023-08-24 14:44:54,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 266 transitions, 1945 flow, removed 44 selfloop flow, removed 2 redundant places. [2023-08-24 14:44:54,652 INFO L231 Difference]: Finished difference. Result has 106 places, 149 transitions, 1253 flow [2023-08-24 14:44:54,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1253, PETRI_PLACES=106, PETRI_TRANSITIONS=149} [2023-08-24 14:44:54,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2023-08-24 14:44:54,655 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 149 transitions, 1253 flow [2023-08-24 14:44:54,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 150.6818181818182) internal successors, (3315), 22 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:54,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:44:54,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:44:54,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 14:44:54,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:44:54,862 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:44:54,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:44:54,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1828332499, now seen corresponding path program 3 times [2023-08-24 14:44:54,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:44:54,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276431348] [2023-08-24 14:44:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:44:54,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:44:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:44:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:44:56,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:44:56,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276431348] [2023-08-24 14:44:56,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276431348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:44:56,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201951220] [2023-08-24 14:44:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 14:44:56,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:44:56,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:44:56,595 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) [2023-08-24 14:44:56,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 14:44:56,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 14:44:56,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:44:56,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 14:44:56,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:44:56,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:44:56,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 14:44:57,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:44:57,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 14:44:57,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-24 14:44:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:44:57,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:44:57,143 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_333 (Array Int Int))) (< 0 (+ c_~total~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_333) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-24 14:44:57,156 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_333 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_333) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-08-24 14:44:57,171 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:44:57,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 157 [2023-08-24 14:44:57,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-24 14:44:57,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-24 14:44:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 14:44:57,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201951220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:44:57,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:44:57,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-08-24 14:44:57,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238847867] [2023-08-24 14:44:57,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:44:57,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:44:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:44:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:44:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=435, Unknown=2, NotChecked=86, Total=600 [2023-08-24 14:44:57,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 460 [2023-08-24 14:44:57,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 149 transitions, 1253 flow. Second operand has 25 states, 25 states have (on average 149.2) internal successors, (3730), 25 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:44:57,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:44:57,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 460 [2023-08-24 14:44:57,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:45:05,248 INFO L124 PetriNetUnfolderBase]: 52741/69331 cut-off events. [2023-08-24 14:45:05,248 INFO L125 PetriNetUnfolderBase]: For 172596/172692 co-relation queries the response was YES. [2023-08-24 14:45:05,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242436 conditions, 69331 events. 52741/69331 cut-off events. For 172596/172692 co-relation queries the response was YES. Maximal size of possible extension queue 3261. Compared 425050 event pairs, 7780 based on Foata normal form. 50/62064 useless extension candidates. Maximal degree in co-relation 218183. Up to 21320 conditions per place. [2023-08-24 14:45:05,926 INFO L140 encePairwiseOnDemand]: 451/460 looper letters, 205 selfloop transitions, 107 changer transitions 16/331 dead transitions. [2023-08-24 14:45:05,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 331 transitions, 2849 flow [2023-08-24 14:45:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 14:45:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 14:45:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2383 transitions. [2023-08-24 14:45:05,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3453623188405797 [2023-08-24 14:45:05,933 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2383 transitions. [2023-08-24 14:45:05,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2383 transitions. [2023-08-24 14:45:05,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:45:05,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2383 transitions. [2023-08-24 14:45:05,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 158.86666666666667) internal successors, (2383), 15 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:45:05,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 460.0) internal successors, (7360), 16 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:45:05,948 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 460.0) internal successors, (7360), 16 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:45:05,948 INFO L175 Difference]: Start difference. First operand has 106 places, 149 transitions, 1253 flow. Second operand 15 states and 2383 transitions. [2023-08-24 14:45:05,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 331 transitions, 2849 flow [2023-08-24 14:45:07,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 331 transitions, 2789 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-24 14:45:07,259 INFO L231 Difference]: Finished difference. Result has 118 places, 178 transitions, 1766 flow [2023-08-24 14:45:07,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1766, PETRI_PLACES=118, PETRI_TRANSITIONS=178} [2023-08-24 14:45:07,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2023-08-24 14:45:07,259 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 178 transitions, 1766 flow [2023-08-24 14:45:07,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 149.2) internal successors, (3730), 25 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:45:07,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:45:07,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:45:07,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 14:45:07,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:45:07,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:45:07,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:45:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash 280698761, now seen corresponding path program 4 times [2023-08-24 14:45:07,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:45:07,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391763584] [2023-08-24 14:45:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:45:07,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:45:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:45:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:45:09,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:45:09,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391763584] [2023-08-24 14:45:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391763584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:45:09,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307015633] [2023-08-24 14:45:09,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 14:45:09,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:45:09,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:45:09,250 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) [2023-08-24 14:45:09,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 14:45:09,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 14:45:09,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:45:09,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 14:45:09,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:45:09,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:45:09,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 14:45:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:45:09,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 14:45:09,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:45:09,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-24 14:45:10,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-08-24 14:45:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:45:10,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:45:12,843 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 14:45:12,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 321 [2023-08-24 14:45:12,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 140 [2023-08-24 14:45:12,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 66 [2023-08-24 14:45:12,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2023-08-24 14:45:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:45:13,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307015633] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:45:13,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:45:13,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 32 [2023-08-24 14:45:13,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425289621] [2023-08-24 14:45:13,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:45:13,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 14:45:13,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:45:13,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 14:45:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=957, Unknown=6, NotChecked=0, Total=1122 [2023-08-24 14:45:13,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 460 [2023-08-24 14:45:13,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 178 transitions, 1766 flow. Second operand has 34 states, 34 states have (on average 143.5) internal successors, (4879), 34 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:45:13,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:45:13,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 460 [2023-08-24 14:45:13,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:45:52,163 INFO L124 PetriNetUnfolderBase]: 186756/244246 cut-off events. [2023-08-24 14:45:52,163 INFO L125 PetriNetUnfolderBase]: For 836809/836889 co-relation queries the response was YES. [2023-08-24 14:45:53,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899631 conditions, 244246 events. 186756/244246 cut-off events. For 836809/836889 co-relation queries the response was YES. Maximal size of possible extension queue 10689. Compared 1685077 event pairs, 9096 based on Foata normal form. 1143/219039 useless extension candidates. Maximal degree in co-relation 854476. Up to 43619 conditions per place. [2023-08-24 14:45:54,633 INFO L140 encePairwiseOnDemand]: 445/460 looper letters, 717 selfloop transitions, 574 changer transitions 32/1326 dead transitions. [2023-08-24 14:45:54,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1326 transitions, 12227 flow [2023-08-24 14:45:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 14:45:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 14:45:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 8129 transitions. [2023-08-24 14:45:54,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398411371237458 [2023-08-24 14:45:54,651 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 8129 transitions. [2023-08-24 14:45:54,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 8129 transitions. [2023-08-24 14:45:54,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:45:54,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 8129 transitions. [2023-08-24 14:45:54,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 156.32692307692307) internal successors, (8129), 52 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:45:54,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 460.0) internal successors, (24380), 53 states have internal predecessors, (24380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:45:54,697 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 460.0) internal successors, (24380), 53 states have internal predecessors, (24380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:45:54,697 INFO L175 Difference]: Start difference. First operand has 118 places, 178 transitions, 1766 flow. Second operand 52 states and 8129 transitions. [2023-08-24 14:45:54,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1326 transitions, 12227 flow [2023-08-24 14:46:03,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 1326 transitions, 12008 flow, removed 86 selfloop flow, removed 7 redundant places. [2023-08-24 14:46:03,331 INFO L231 Difference]: Finished difference. Result has 189 places, 683 transitions, 8934 flow [2023-08-24 14:46:03,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=8934, PETRI_PLACES=189, PETRI_TRANSITIONS=683} [2023-08-24 14:46:03,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2023-08-24 14:46:03,332 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 683 transitions, 8934 flow [2023-08-24 14:46:03,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 143.5) internal successors, (4879), 34 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:46:03,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:46:03,333 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:46:03,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 14:46:03,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:46:03,538 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:46:03,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:46:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -592974436, now seen corresponding path program 5 times [2023-08-24 14:46:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:46:03,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948082293] [2023-08-24 14:46:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:46:03,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:46:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:46:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:46:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:46:05,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948082293] [2023-08-24 14:46:05,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948082293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:46:05,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927036291] [2023-08-24 14:46:05,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 14:46:05,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:46:05,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:46:05,349 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) [2023-08-24 14:46:05,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 14:46:05,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 14:46:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:46:05,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 14:46:05,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:46:05,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:46:05,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 14:46:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:46:05,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 14:46:05,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:46:05,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 14:46:05,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-24 14:46:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 14:46:05,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:46:05,902 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_479 (Array Int Int))) (< 0 (+ c_~total~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_479) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-24 14:46:07,974 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_479 (Array Int Int)) (v_ArrVal_478 (Array Int Int)) (v_ArrVal_477 (Array Int Int))) (< 0 (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_477) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_478) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_479) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-08-24 14:46:07,987 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:46:07,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 325 [2023-08-24 14:46:07,995 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 67 [2023-08-24 14:46:08,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2023-08-24 14:46:08,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2023-08-24 14:46:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 14:46:08,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927036291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:46:08,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:46:08,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-08-24 14:46:08,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797325299] [2023-08-24 14:46:08,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:46:08,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:46:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:46:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:46:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=433, Unknown=3, NotChecked=86, Total=600 [2023-08-24 14:46:08,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 460 [2023-08-24 14:46:08,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 683 transitions, 8934 flow. Second operand has 25 states, 25 states have (on average 147.6) internal successors, (3690), 25 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:46:08,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:46:08,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 460 [2023-08-24 14:46:08,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:46:51,402 INFO L124 PetriNetUnfolderBase]: 203323/266294 cut-off events. [2023-08-24 14:46:51,402 INFO L125 PetriNetUnfolderBase]: For 2210242/2210312 co-relation queries the response was YES. [2023-08-24 14:46:54,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247865 conditions, 266294 events. 203323/266294 cut-off events. For 2210242/2210312 co-relation queries the response was YES. Maximal size of possible extension queue 11431. Compared 1854957 event pairs, 33653 based on Foata normal form. 68/237671 useless extension candidates. Maximal degree in co-relation 1228898. Up to 122698 conditions per place. [2023-08-24 14:46:55,315 INFO L140 encePairwiseOnDemand]: 439/460 looper letters, 349 selfloop transitions, 510 changer transitions 11/875 dead transitions. [2023-08-24 14:46:55,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 875 transitions, 12406 flow [2023-08-24 14:46:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 14:46:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 14:46:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2331 transitions. [2023-08-24 14:46:55,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3378260869565217 [2023-08-24 14:46:55,319 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2331 transitions. [2023-08-24 14:46:55,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2331 transitions. [2023-08-24 14:46:55,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:46:55,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2331 transitions. [2023-08-24 14:46:55,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 155.4) internal successors, (2331), 15 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:46:55,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 460.0) internal successors, (7360), 16 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:46:55,329 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 460.0) internal successors, (7360), 16 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:46:55,329 INFO L175 Difference]: Start difference. First operand has 189 places, 683 transitions, 8934 flow. Second operand 15 states and 2331 transitions. [2023-08-24 14:46:55,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 875 transitions, 12406 flow [2023-08-24 14:48:20,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 875 transitions, 11931 flow, removed 223 selfloop flow, removed 6 redundant places. [2023-08-24 14:48:20,070 INFO L231 Difference]: Finished difference. Result has 199 places, 754 transitions, 10840 flow [2023-08-24 14:48:20,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=8523, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10840, PETRI_PLACES=199, PETRI_TRANSITIONS=754} [2023-08-24 14:48:20,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2023-08-24 14:48:20,070 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 754 transitions, 10840 flow [2023-08-24 14:48:20,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 147.6) internal successors, (3690), 25 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:48:20,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:48:20,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:48:20,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 14:48:20,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:48:20,278 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 14:48:20,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:48:20,278 INFO L85 PathProgramCache]: Analyzing trace with hash 318123085, now seen corresponding path program 1 times [2023-08-24 14:48:20,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:48:20,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164259140] [2023-08-24 14:48:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:48:20,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:48:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:48:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:48:20,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:48:20,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164259140] [2023-08-24 14:48:20,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164259140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:48:20,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:48:20,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:48:20,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249276701] [2023-08-24 14:48:20,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:48:20,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:48:20,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:48:20,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:48:20,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:48:20,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 460 [2023-08-24 14:48:20,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 754 transitions, 10840 flow. Second operand has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:48:20,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:48:20,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 460 [2023-08-24 14:48:20,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand