/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 01:47:27,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 01:47:27,374 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 01:47:27,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 01:47:27,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 01:47:27,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 01:47:27,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 01:47:27,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 01:47:27,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 01:47:27,411 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 01:47:27,411 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 01:47:27,411 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 01:47:27,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 01:47:27,412 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 01:47:27,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 01:47:27,412 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 01:47:27,413 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 01:47:27,413 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 01:47:27,413 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 01:47:27,413 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 01:47:27,413 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 01:47:27,414 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 01:47:27,414 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 01:47:27,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 01:47:27,415 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 01:47:27,415 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 01:47:27,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 01:47:27,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 01:47:27,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 01:47:27,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 01:47:27,416 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 01:47:27,416 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 01:47:27,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 01:47:27,416 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 01:47:27,416 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 01:47:27,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 01:47:27,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 01:47:27,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 01:47:27,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 01:47:27,688 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 01:47:27,689 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 01:47:27,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-24 01:47:28,645 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 01:47:28,808 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 01:47:28,808 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-24 01:47:28,814 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8ce16ca/f5c73794061c4986a007e2b8d7548d45/FLAG933a02130 [2023-08-24 01:47:28,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8ce16ca/f5c73794061c4986a007e2b8d7548d45 [2023-08-24 01:47:28,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 01:47:28,826 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 01:47:28,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 01:47:28,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 01:47:28,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 01:47:28,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:28,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb704ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28, skipping insertion in model container [2023-08-24 01:47:28,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:28,849 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 01:47:28,953 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-24 01:47:28,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 01:47:28,966 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 01:47:28,987 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-24 01:47:28,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 01:47:28,995 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 01:47:28,995 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 01:47:28,999 INFO L206 MainTranslator]: Completed translation [2023-08-24 01:47:28,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28 WrapperNode [2023-08-24 01:47:28,999 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 01:47:29,000 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 01:47:29,000 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 01:47:29,000 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 01:47:29,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,042 INFO L138 Inliner]: procedures = 29, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 404 [2023-08-24 01:47:29,045 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 01:47:29,046 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 01:47:29,046 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 01:47:29,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 01:47:29,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,054 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,055 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,061 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,069 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 01:47:29,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 01:47:29,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 01:47:29,070 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 01:47:29,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (1/1) ... [2023-08-24 01:47:29,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 01:47:29,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:47:29,109 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 01:47:29,129 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 01:47:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 01:47:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 01:47:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 01:47:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 01:47:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 01:47:29,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 01:47:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 01:47:29,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 01:47:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 01:47:29,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 01:47:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-24 01:47:29,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-24 01:47:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 01:47:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-24 01:47:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-24 01:47:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-24 01:47:29,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-24 01:47:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 01:47:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 01:47:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 01:47:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 01:47:29,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 01:47:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 01:47:29,147 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 01:47:29,243 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 01:47:29,245 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 01:47:29,651 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 01:47:29,819 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 01:47:29,819 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-24 01:47:29,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:47:29 BoogieIcfgContainer [2023-08-24 01:47:29,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 01:47:29,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 01:47:29,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 01:47:29,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 01:47:29,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:47:28" (1/3) ... [2023-08-24 01:47:29,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608f6207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:47:29, skipping insertion in model container [2023-08-24 01:47:29,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:47:28" (2/3) ... [2023-08-24 01:47:29,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608f6207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:47:29, skipping insertion in model container [2023-08-24 01:47:29,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:47:29" (3/3) ... [2023-08-24 01:47:29,829 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-08-24 01:47:29,839 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 01:47:29,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 01:47:29,840 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 01:47:29,936 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-24 01:47:29,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 311 transitions, 694 flow [2023-08-24 01:47:30,077 INFO L124 PetriNetUnfolderBase]: 21/267 cut-off events. [2023-08-24 01:47:30,077 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 01:47:30,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 267 events. 21/267 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 308 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 229. Up to 3 conditions per place. [2023-08-24 01:47:30,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 311 transitions, 694 flow [2023-08-24 01:47:30,090 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 259 transitions, 566 flow [2023-08-24 01:47:30,094 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 01:47:30,101 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 259 transitions, 566 flow [2023-08-24 01:47:30,104 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 259 transitions, 566 flow [2023-08-24 01:47:30,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 259 transitions, 566 flow [2023-08-24 01:47:30,158 INFO L124 PetriNetUnfolderBase]: 21/259 cut-off events. [2023-08-24 01:47:30,158 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 01:47:30,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 259 events. 21/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 297 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 229. Up to 3 conditions per place. [2023-08-24 01:47:30,165 INFO L119 LiptonReduction]: Number of co-enabled transitions 8992 [2023-08-24 01:47:36,846 INFO L134 LiptonReduction]: Checked pairs total: 32361 [2023-08-24 01:47:36,847 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-24 01:47:36,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 01:47:36,859 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;@59e3d8fc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 01:47:36,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-24 01:47:36,865 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 01:47:36,866 INFO L124 PetriNetUnfolderBase]: 9/60 cut-off events. [2023-08-24 01:47:36,866 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 01:47:36,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:36,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:47:36,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:36,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:36,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1830445934, now seen corresponding path program 1 times [2023-08-24 01:47:36,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:36,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975734986] [2023-08-24 01:47:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:36,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:37,403 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 01:47:37,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975734986] [2023-08-24 01:47:37,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975734986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:47:37,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:47:37,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 01:47:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531422724] [2023-08-24 01:47:37,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:47:37,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 01:47:37,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:47:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 01:47:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 01:47:37,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 557 [2023-08-24 01:47:37,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 01:47:37,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:47:37,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 557 [2023-08-24 01:47:37,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:47:38,031 INFO L124 PetriNetUnfolderBase]: 4669/6729 cut-off events. [2023-08-24 01:47:38,031 INFO L125 PetriNetUnfolderBase]: For 1689/1689 co-relation queries the response was YES. [2023-08-24 01:47:38,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14663 conditions, 6729 events. 4669/6729 cut-off events. For 1689/1689 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 31703 event pairs, 3014 based on Foata normal form. 36/4961 useless extension candidates. Maximal degree in co-relation 7761. Up to 3367 conditions per place. [2023-08-24 01:47:38,052 INFO L140 encePairwiseOnDemand]: 551/557 looper letters, 38 selfloop transitions, 2 changer transitions 31/93 dead transitions. [2023-08-24 01:47:38,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 421 flow [2023-08-24 01:47:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 01:47:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 01:47:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1038 transitions. [2023-08-24 01:47:38,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658886894075404 [2023-08-24 01:47:38,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1038 transitions. [2023-08-24 01:47:38,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1038 transitions. [2023-08-24 01:47:38,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:47:38,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1038 transitions. [2023-08-24 01:47:38,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.5) internal successors, (1038), 4 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states 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 01:47:38,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states 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 01:47:38,080 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states 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 01:47:38,081 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 170 flow. Second operand 4 states and 1038 transitions. [2023-08-24 01:47:38,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 421 flow [2023-08-24 01:47:38,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 359 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-24 01:47:38,104 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 156 flow [2023-08-24 01:47:38,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-24 01:47:38,107 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-24 01:47:38,108 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 156 flow [2023-08-24 01:47:38,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 01:47:38,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:38,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:47:38,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 01:47:38,109 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:38,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash -347521073, now seen corresponding path program 1 times [2023-08-24 01:47:38,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:38,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083807181] [2023-08-24 01:47:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:38,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:47:38,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:38,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083807181] [2023-08-24 01:47:38,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083807181] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:47:38,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:47:38,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 01:47:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764105780] [2023-08-24 01:47:38,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:47:38,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 01:47:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:47:38,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 01:47:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 01:47:38,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 557 [2023-08-24 01:47:38,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states 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 01:47:38,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:47:38,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 557 [2023-08-24 01:47:38,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:47:39,538 INFO L124 PetriNetUnfolderBase]: 7727/10406 cut-off events. [2023-08-24 01:47:39,539 INFO L125 PetriNetUnfolderBase]: For 1771/1815 co-relation queries the response was YES. [2023-08-24 01:47:39,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22255 conditions, 10406 events. 7727/10406 cut-off events. For 1771/1815 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 46359 event pairs, 2017 based on Foata normal form. 23/8382 useless extension candidates. Maximal degree in co-relation 22243. Up to 3712 conditions per place. [2023-08-24 01:47:39,577 INFO L140 encePairwiseOnDemand]: 548/557 looper letters, 111 selfloop transitions, 10 changer transitions 9/152 dead transitions. [2023-08-24 01:47:39,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 152 transitions, 651 flow [2023-08-24 01:47:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 01:47:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 01:47:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1636 transitions. [2023-08-24 01:47:39,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48952722920406944 [2023-08-24 01:47:39,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1636 transitions. [2023-08-24 01:47:39,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1636 transitions. [2023-08-24 01:47:39,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:47:39,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1636 transitions. [2023-08-24 01:47:39,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 272.6666666666667) internal successors, (1636), 6 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states 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 01:47:39,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:39,589 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:39,589 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 156 flow. Second operand 6 states and 1636 transitions. [2023-08-24 01:47:39,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 152 transitions, 651 flow [2023-08-24 01:47:39,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 152 transitions, 639 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 01:47:39,599 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 221 flow [2023-08-24 01:47:39,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-08-24 01:47:39,600 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-08-24 01:47:39,600 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 221 flow [2023-08-24 01:47:39,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states 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 01:47:39,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:39,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:47:39,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 01:47:39,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:39,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:39,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1663120577, now seen corresponding path program 2 times [2023-08-24 01:47:39,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:39,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743281344] [2023-08-24 01:47:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:39,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:47:40,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:40,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743281344] [2023-08-24 01:47:40,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743281344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:47:40,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141316889] [2023-08-24 01:47:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 01:47:40,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:47:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:47:40,052 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 01:47:40,120 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 01:47:40,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 01:47:40,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:47:40,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 01:47:40,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:47:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:47:40,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 01:47:40,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141316889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:47:40,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 01:47:40,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-24 01:47:40,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493438627] [2023-08-24 01:47:40,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:47:40,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 01:47:40,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:47:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 01:47:40,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-24 01:47:40,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 557 [2023-08-24 01:47:40,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states 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 01:47:40,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:47:40,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 557 [2023-08-24 01:47:40,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:47:41,404 INFO L124 PetriNetUnfolderBase]: 7715/10496 cut-off events. [2023-08-24 01:47:41,404 INFO L125 PetriNetUnfolderBase]: For 5055/5075 co-relation queries the response was YES. [2023-08-24 01:47:41,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26142 conditions, 10496 events. 7715/10496 cut-off events. For 5055/5075 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 49108 event pairs, 1575 based on Foata normal form. 15/9657 useless extension candidates. Maximal degree in co-relation 26128. Up to 3712 conditions per place. [2023-08-24 01:47:41,450 INFO L140 encePairwiseOnDemand]: 548/557 looper letters, 106 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2023-08-24 01:47:41,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 149 transitions, 696 flow [2023-08-24 01:47:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 01:47:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 01:47:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1631 transitions. [2023-08-24 01:47:41,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48803111909036506 [2023-08-24 01:47:41,453 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1631 transitions. [2023-08-24 01:47:41,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1631 transitions. [2023-08-24 01:47:41,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:47:41,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1631 transitions. [2023-08-24 01:47:41,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 271.8333333333333) internal successors, (1631), 6 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states 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 01:47:41,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:41,462 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:41,462 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 221 flow. Second operand 6 states and 1631 transitions. [2023-08-24 01:47:41,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 149 transitions, 696 flow [2023-08-24 01:47:41,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 149 transitions, 684 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 01:47:41,471 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 266 flow [2023-08-24 01:47:41,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2023-08-24 01:47:41,472 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-24 01:47:41,472 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 266 flow [2023-08-24 01:47:41,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states 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 01:47:41,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:41,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:47:41,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 01:47:41,679 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 01:47:41,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:41,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash 749729116, now seen corresponding path program 1 times [2023-08-24 01:47:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:41,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512366778] [2023-08-24 01:47:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:41,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:47:41,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:41,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512366778] [2023-08-24 01:47:41,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512366778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:47:41,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427312241] [2023-08-24 01:47:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:41,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:47:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:47:41,937 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 01:47:41,962 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 01:47:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:42,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 01:47:42,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:47:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:47:42,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:47:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:47:42,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427312241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 01:47:42,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 01:47:42,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-24 01:47:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142754466] [2023-08-24 01:47:42,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 01:47:42,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 01:47:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:47:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 01:47:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-24 01:47:42,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 557 [2023-08-24 01:47:42,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 245.54545454545453) internal successors, (2701), 11 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states 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 01:47:42,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:47:42,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 557 [2023-08-24 01:47:42,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:47:43,713 INFO L124 PetriNetUnfolderBase]: 13636/19161 cut-off events. [2023-08-24 01:47:43,713 INFO L125 PetriNetUnfolderBase]: For 14803/14819 co-relation queries the response was YES. [2023-08-24 01:47:43,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48861 conditions, 19161 events. 13636/19161 cut-off events. For 14803/14819 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 102967 event pairs, 8879 based on Foata normal form. 1078/18598 useless extension candidates. Maximal degree in co-relation 48838. Up to 8662 conditions per place. [2023-08-24 01:47:43,783 INFO L140 encePairwiseOnDemand]: 551/557 looper letters, 105 selfloop transitions, 6 changer transitions 1/134 dead transitions. [2023-08-24 01:47:43,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 134 transitions, 725 flow [2023-08-24 01:47:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 01:47:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 01:47:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1529 transitions. [2023-08-24 01:47:43,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751047277079593 [2023-08-24 01:47:43,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1529 transitions. [2023-08-24 01:47:43,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1529 transitions. [2023-08-24 01:47:43,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:47:43,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1529 transitions. [2023-08-24 01:47:43,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 254.83333333333334) internal successors, (1529), 6 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states 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 01:47:43,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:43,793 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:43,793 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 266 flow. Second operand 6 states and 1529 transitions. [2023-08-24 01:47:43,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 134 transitions, 725 flow [2023-08-24 01:47:43,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 134 transitions, 699 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 01:47:43,831 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 316 flow [2023-08-24 01:47:43,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2023-08-24 01:47:43,832 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2023-08-24 01:47:43,832 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 316 flow [2023-08-24 01:47:43,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 245.54545454545453) internal successors, (2701), 11 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states 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 01:47:43,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:43,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 01:47:43,838 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 01:47:44,038 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 01:47:44,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:44,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash -279254443, now seen corresponding path program 1 times [2023-08-24 01:47:44,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:44,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497563129] [2023-08-24 01:47:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:44,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:47:44,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:44,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497563129] [2023-08-24 01:47:44,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497563129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:47:44,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410292503] [2023-08-24 01:47:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:44,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:47:44,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:47:44,261 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 01:47:44,262 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 01:47:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:44,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 01:47:44,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:47:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:47:44,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:47:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:47:44,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410292503] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 01:47:44,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 01:47:44,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-24 01:47:44,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993442982] [2023-08-24 01:47:44,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 01:47:44,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 01:47:44,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:47:44,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 01:47:44,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-24 01:47:44,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 557 [2023-08-24 01:47:44,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 316 flow. Second operand has 11 states, 11 states have (on average 245.0) internal successors, (2695), 11 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states 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 01:47:44,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:47:44,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 557 [2023-08-24 01:47:44,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:47:45,717 INFO L124 PetriNetUnfolderBase]: 9494/13491 cut-off events. [2023-08-24 01:47:45,718 INFO L125 PetriNetUnfolderBase]: For 12385/12385 co-relation queries the response was YES. [2023-08-24 01:47:45,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34114 conditions, 13491 events. 9494/13491 cut-off events. For 12385/12385 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 70060 event pairs, 6113 based on Foata normal form. 418/12754 useless extension candidates. Maximal degree in co-relation 30958. Up to 8982 conditions per place. [2023-08-24 01:47:45,774 INFO L140 encePairwiseOnDemand]: 551/557 looper letters, 64 selfloop transitions, 5 changer transitions 31/122 dead transitions. [2023-08-24 01:47:45,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 122 transitions, 643 flow [2023-08-24 01:47:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 01:47:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 01:47:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1525 transitions. [2023-08-24 01:47:45,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45631358467983246 [2023-08-24 01:47:45,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1525 transitions. [2023-08-24 01:47:45,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1525 transitions. [2023-08-24 01:47:45,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:47:45,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1525 transitions. [2023-08-24 01:47:45,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 254.16666666666666) internal successors, (1525), 6 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 01:47:45,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:45,784 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:45,784 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 316 flow. Second operand 6 states and 1525 transitions. [2023-08-24 01:47:45,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 122 transitions, 643 flow [2023-08-24 01:47:45,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 635 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 01:47:45,804 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 299 flow [2023-08-24 01:47:45,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2023-08-24 01:47:45,804 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-08-24 01:47:45,805 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 299 flow [2023-08-24 01:47:45,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 245.0) internal successors, (2695), 11 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states 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 01:47:45,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:45,806 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, 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 01:47:45,823 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 01:47:46,012 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 01:47:46,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:46,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:46,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1388826123, now seen corresponding path program 2 times [2023-08-24 01:47:46,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:46,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282274427] [2023-08-24 01:47:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:46,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:46,258 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 01:47:46,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282274427] [2023-08-24 01:47:46,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282274427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:47:46,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:47:46,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 01:47:46,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002646773] [2023-08-24 01:47:46,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:47:46,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 01:47:46,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:47:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 01:47:46,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 01:47:46,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 557 [2023-08-24 01:47:46,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 299 flow. Second operand has 5 states, 5 states have (on average 257.4) internal successors, (1287), 5 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states 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 01:47:46,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:47:46,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 557 [2023-08-24 01:47:46,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:47:47,749 INFO L124 PetriNetUnfolderBase]: 16069/21364 cut-off events. [2023-08-24 01:47:47,750 INFO L125 PetriNetUnfolderBase]: For 20948/21168 co-relation queries the response was YES. [2023-08-24 01:47:47,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57265 conditions, 21364 events. 16069/21364 cut-off events. For 20948/21168 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 102829 event pairs, 4425 based on Foata normal form. 186/19824 useless extension candidates. Maximal degree in co-relation 57227. Up to 7212 conditions per place. [2023-08-24 01:47:47,966 INFO L140 encePairwiseOnDemand]: 551/557 looper letters, 100 selfloop transitions, 17 changer transitions 2/141 dead transitions. [2023-08-24 01:47:47,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 141 transitions, 758 flow [2023-08-24 01:47:47,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 01:47:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 01:47:47,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1109 transitions. [2023-08-24 01:47:47,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49775583482944347 [2023-08-24 01:47:47,970 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1109 transitions. [2023-08-24 01:47:47,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1109 transitions. [2023-08-24 01:47:47,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:47:47,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1109 transitions. [2023-08-24 01:47:47,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.25) internal successors, (1109), 4 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states 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 01:47:47,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states 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 01:47:47,975 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states 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 01:47:47,975 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 299 flow. Second operand 4 states and 1109 transitions. [2023-08-24 01:47:47,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 141 transitions, 758 flow [2023-08-24 01:47:48,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 141 transitions, 709 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-24 01:47:48,071 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 383 flow [2023-08-24 01:47:48,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=383, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-08-24 01:47:48,073 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 10 predicate places. [2023-08-24 01:47:48,073 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 383 flow [2023-08-24 01:47:48,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 257.4) internal successors, (1287), 5 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states 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 01:47:48,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:48,076 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, 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 01:47:48,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 01:47:48,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:48,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1485394170, now seen corresponding path program 2 times [2023-08-24 01:47:48,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:48,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191642078] [2023-08-24 01:47:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:48,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 01:47:48,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:48,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191642078] [2023-08-24 01:47:48,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191642078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:47:48,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728488302] [2023-08-24 01:47:48,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 01:47:48,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:47:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:47:48,246 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 01:47:48,248 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 01:47:48,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 01:47:48,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 01:47:48,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 01:47:48,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:47:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:47:48,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:47:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 01:47:48,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728488302] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 01:47:48,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 01:47:48,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 12 [2023-08-24 01:47:48,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392105825] [2023-08-24 01:47:48,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:47:48,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 01:47:48,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:47:48,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 01:47:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-24 01:47:48,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 557 [2023-08-24 01:47:48,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 246.5) internal successors, (1479), 6 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states 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 01:47:48,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:47:48,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 557 [2023-08-24 01:47:48,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:47:50,573 INFO L124 PetriNetUnfolderBase]: 19561/26052 cut-off events. [2023-08-24 01:47:50,573 INFO L125 PetriNetUnfolderBase]: For 32444/32528 co-relation queries the response was YES. [2023-08-24 01:47:50,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74796 conditions, 26052 events. 19561/26052 cut-off events. For 32444/32528 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 130923 event pairs, 5063 based on Foata normal form. 126/24096 useless extension candidates. Maximal degree in co-relation 74763. Up to 17823 conditions per place. [2023-08-24 01:47:50,659 INFO L140 encePairwiseOnDemand]: 551/557 looper letters, 74 selfloop transitions, 10 changer transitions 2/108 dead transitions. [2023-08-24 01:47:50,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 108 transitions, 631 flow [2023-08-24 01:47:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 01:47:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 01:47:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1516 transitions. [2023-08-24 01:47:50,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45362058647516457 [2023-08-24 01:47:50,662 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1516 transitions. [2023-08-24 01:47:50,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1516 transitions. [2023-08-24 01:47:50,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:47:50,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1516 transitions. [2023-08-24 01:47:50,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states 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 01:47:50,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:50,668 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 557.0) internal successors, (3899), 7 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states 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 01:47:50,668 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 383 flow. Second operand 6 states and 1516 transitions. [2023-08-24 01:47:50,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 108 transitions, 631 flow [2023-08-24 01:47:50,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 583 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-24 01:47:50,860 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 361 flow [2023-08-24 01:47:50,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2023-08-24 01:47:50,860 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 11 predicate places. [2023-08-24 01:47:50,860 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 361 flow [2023-08-24 01:47:50,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 246.5) internal successors, (1479), 6 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states 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 01:47:50,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:50,861 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, 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 01:47:50,869 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 01:47:51,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:47:51,067 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:51,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash 351726505, now seen corresponding path program 1 times [2023-08-24 01:47:51,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:51,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738377325] [2023-08-24 01:47:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:51,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:51,237 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 01:47:51,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:51,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738377325] [2023-08-24 01:47:51,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738377325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 01:47:51,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 01:47:51,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 01:47:51,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831684530] [2023-08-24 01:47:51,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 01:47:51,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 01:47:51,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:47:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 01:47:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 01:47:51,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 557 [2023-08-24 01:47:51,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 361 flow. Second operand has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states 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 01:47:51,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:47:51,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 557 [2023-08-24 01:47:51,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:47:53,101 INFO L124 PetriNetUnfolderBase]: 21990/29081 cut-off events. [2023-08-24 01:47:53,101 INFO L125 PetriNetUnfolderBase]: For 26760/26916 co-relation queries the response was YES. [2023-08-24 01:47:53,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82504 conditions, 29081 events. 21990/29081 cut-off events. For 26760/26916 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 141527 event pairs, 5027 based on Foata normal form. 108/26915 useless extension candidates. Maximal degree in co-relation 82469. Up to 19453 conditions per place. [2023-08-24 01:47:53,215 INFO L140 encePairwiseOnDemand]: 550/557 looper letters, 111 selfloop transitions, 17 changer transitions 13/163 dead transitions. [2023-08-24 01:47:53,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 163 transitions, 941 flow [2023-08-24 01:47:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 01:47:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 01:47:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1368 transitions. [2023-08-24 01:47:53,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912028725314183 [2023-08-24 01:47:53,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1368 transitions. [2023-08-24 01:47:53,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1368 transitions. [2023-08-24 01:47:53,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 01:47:53,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1368 transitions. [2023-08-24 01:47:53,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 273.6) internal successors, (1368), 5 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states 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 01:47:53,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 557.0) internal successors, (3342), 6 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states 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 01:47:53,224 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 557.0) internal successors, (3342), 6 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states 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 01:47:53,224 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 361 flow. Second operand 5 states and 1368 transitions. [2023-08-24 01:47:53,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 163 transitions, 941 flow [2023-08-24 01:47:53,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 163 transitions, 936 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 01:47:53,235 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 494 flow [2023-08-24 01:47:53,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=494, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2023-08-24 01:47:53,235 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2023-08-24 01:47:53,236 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 494 flow [2023-08-24 01:47:53,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states 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 01:47:53,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 01:47:53,236 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, 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 01:47:53,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 01:47:53,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-24 01:47:53,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 01:47:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -88238672, now seen corresponding path program 1 times [2023-08-24 01:47:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 01:47:53,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513043877] [2023-08-24 01:47:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:53,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 01:47:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:47:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 01:47:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513043877] [2023-08-24 01:47:54,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513043877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 01:47:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127712102] [2023-08-24 01:47:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 01:47:54,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 01:47:54,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 01:47:54,372 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 01:47:54,374 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 01:47:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 01:47:54,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 99 conjunts are in the unsatisfiable core [2023-08-24 01:47:54,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 01:47:54,619 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 13 treesize of output 9 [2023-08-24 01:47:54,665 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 01:47:54,861 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 01:47:54,973 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 01:47:55,164 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 01:47:55,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:47:55,351 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 16 treesize of output 18 [2023-08-24 01:47:55,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 01:47:55,455 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 16 treesize of output 18 [2023-08-24 01:47:55,597 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 01:47:55,690 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 01:47:55,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 01:48:15,940 WARN L234 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:49:27,859 WARN L234 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:50:04,119 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:50:08,402 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 01:50:08,402 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 69 treesize of output 58 [2023-08-24 01:50:08,431 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 83681270 treesize of output 81764342 [2023-08-24 01:50:08,881 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 1066 treesize of output 1042 [2023-08-24 01:50:08,902 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 526 treesize of output 514 [2023-08-24 01:50:08,918 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 1030 treesize of output 966 [2023-08-24 01:50:08,939 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 966 treesize of output 838 [2023-08-24 01:50:08,955 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 838 treesize of output 742 [2023-08-24 01:50:08,970 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 742 treesize of output 694 [2023-08-24 01:50:09,724 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 01:50:09,736 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 01:50:09,736 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 71 treesize of output 1 [2023-08-24 01:50:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 01:50:13,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127712102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 01:50:13,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 01:50:13,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2023-08-24 01:50:13,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871900741] [2023-08-24 01:50:13,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 01:50:13,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 01:50:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 01:50:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 01:50:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1693, Unknown=58, NotChecked=0, Total=1980 [2023-08-24 01:50:13,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 557 [2023-08-24 01:50:13,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 494 flow. Second operand has 45 states, 45 states have (on average 189.73333333333332) internal successors, (8538), 45 states have internal predecessors, (8538), 0 states have call successors, (0), 0 states 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 01:50:13,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 01:50:13,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 557 [2023-08-24 01:50:13,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 01:50:32,923 WARN L234 SmtUtils]: Spent 17.42s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:50:35,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:50:37,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:50:57,207 WARN L234 SmtUtils]: Spent 16.94s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:51:17,370 WARN L234 SmtUtils]: Spent 17.47s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:51:19,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:51:21,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:51:24,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:51:26,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:51:28,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:51:30,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:53:21,744 WARN L234 SmtUtils]: Spent 1.76m on a formula simplification. DAG size of input: 289 DAG size of output: 275 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:54:04,892 WARN L234 SmtUtils]: Spent 40.96s on a formula simplification. DAG size of input: 252 DAG size of output: 242 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:56:04,641 WARN L234 SmtUtils]: Spent 1.96m on a formula simplification. DAG size of input: 253 DAG size of output: 249 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:56:38,218 WARN L234 SmtUtils]: Spent 27.56s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:56:40,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 01:58:36,926 WARN L234 SmtUtils]: Spent 1.70m on a formula simplification. DAG size of input: 270 DAG size of output: 260 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 01:59:45,938 WARN L234 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 282 DAG size of output: 272 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:00:04,464 WARN L234 SmtUtils]: Spent 12.70s on a formula simplification that was a NOOP. DAG size: 217 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:00:05,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:00:30,890 WARN L234 SmtUtils]: Spent 19.40s on a formula simplification that was a NOOP. DAG size: 233 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:01:34,906 WARN L234 SmtUtils]: Spent 57.21s on a formula simplification. DAG size of input: 245 DAG size of output: 235 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-24 02:01:58,720 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 02:01:58,720 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 02:01:59,729 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 02:01:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 02:01:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 02:01:59,852 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:264) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:167) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:482) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfoldingHelper(PetriNetUnfolderBase.java:226) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfolding(PetriNetUnfolderBase.java:183) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.(PetriNetUnfolderBase.java:123) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:72) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:128) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-08-24 02:01:59,855 INFO L158 Benchmark]: Toolchain (without parser) took 871028.38ms. Allocated memory was 331.4MB in the beginning and 2.8GB in the end (delta: 2.4GB). Free memory was 307.7MB in the beginning and 1.4GB in the end (delta: -1.1GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-24 02:01:59,855 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 331.4MB. Free memory is still 308.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 02:01:59,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.66ms. Allocated memory is still 331.4MB. Free memory was 307.1MB in the beginning and 294.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 02:01:59,855 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.00ms. Allocated memory is still 331.4MB. Free memory was 294.2MB in the beginning and 291.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-24 02:01:59,855 INFO L158 Benchmark]: Boogie Preprocessor took 23.38ms. Allocated memory is still 331.4MB. Free memory was 291.0MB in the beginning and 288.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:01:59,855 INFO L158 Benchmark]: RCFGBuilder took 751.84ms. Allocated memory is still 331.4MB. Free memory was 288.4MB in the beginning and 283.4MB in the end (delta: 5.0MB). Peak memory consumption was 42.2MB. Max. memory is 16.0GB. [2023-08-24 02:01:59,856 INFO L158 Benchmark]: TraceAbstraction took 870030.72ms. Allocated memory was 331.4MB in the beginning and 2.8GB in the end (delta: 2.4GB). Free memory was 282.5MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-24 02:01:59,856 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 331.4MB. Free memory is still 308.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 172.66ms. Allocated memory is still 331.4MB. Free memory was 307.1MB in the beginning and 294.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 45.00ms. Allocated memory is still 331.4MB. Free memory was 294.2MB in the beginning and 291.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.38ms. Allocated memory is still 331.4MB. Free memory was 291.0MB in the beginning and 288.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 751.84ms. Allocated memory is still 331.4MB. Free memory was 288.4MB in the beginning and 283.4MB in the end (delta: 5.0MB). Peak memory consumption was 42.2MB. Max. memory is 16.0GB. * TraceAbstraction took 870030.72ms. Allocated memory was 331.4MB in the beginning and 2.8GB in the end (delta: 2.4GB). Free memory was 282.5MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.7s, 257 PlacesBefore, 71 PlacesAfterwards, 259 TransitionsBefore, 61 TransitionsAfterwards, 8992 CoEnabledTransitionPairs, 9 FixpointIterations, 122 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 23 TrivialYvCompositions, 24 ConcurrentYvCompositions, 12 ChoiceCompositions, 242 TotalNumberOfCompositions, 32361 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 20834, independent: 20371, independent conditional: 0, independent unconditional: 20371, dependent: 463, dependent conditional: 0, dependent unconditional: 463, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4999, independent: 4936, independent conditional: 0, independent unconditional: 4936, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 20834, independent: 15435, independent conditional: 0, independent unconditional: 15435, dependent: 400, dependent conditional: 0, dependent unconditional: 400, unknown: 4999, unknown conditional: 0, unknown unconditional: 4999] , Statistics on independence cache: Total cache size (in pairs): 657, Positive cache size: 627, Positive conditional cache size: 0, Positive unconditional cache size: 627, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown