/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-ticket-8.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:07:04,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:07:04,833 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-SemanticLbe.epf [2023-11-17 16:07:04,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:07:04,859 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:07:04,859 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:07:04,860 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:07:04,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:07:04,860 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:07:04,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:07:04,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:07:04,861 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:07:04,862 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:07:04,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:07:04,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:07:04,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:07:04,863 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:07:04,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:07:04,863 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:07:04,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:07:04,864 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:07:04,868 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:07:04,868 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:07:04,868 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:07:04,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:07:04,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:07:04,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:07:04,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:07:04,872 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:07:04,872 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:07:04,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:07:04,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:07:04,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:07:05,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:07:05,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:07:05,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:07:05,086 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:07:05,086 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:07:05,087 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-8.wvr.c [2023-11-17 16:07:06,241 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:07:06,442 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:07:06,442 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-8.wvr.c [2023-11-17 16:07:06,450 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/265451e92/f1525e8f77e64ec9954e96624fd7af1a/FLAG70eaf7378 [2023-11-17 16:07:06,470 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/265451e92/f1525e8f77e64ec9954e96624fd7af1a [2023-11-17 16:07:06,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:07:06,475 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:07:06,477 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:07:06,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:07:06,481 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:07:06,482 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bc1da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06, skipping insertion in model container [2023-11-17 16:07:06,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,517 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:07:06,653 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-ticket-8.wvr.c[5378,5391] [2023-11-17 16:07:06,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:07:06,664 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:07:06,690 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-ticket-8.wvr.c[5378,5391] [2023-11-17 16:07:06,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:07:06,697 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:07:06,697 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:07:06,702 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:07:06,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06 WrapperNode [2023-11-17 16:07:06,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:07:06,705 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:07:06,705 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:07:06,705 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:07:06,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,718 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,758 INFO L138 Inliner]: procedures = 27, calls = 130, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 377 [2023-11-17 16:07:06,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:07:06,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:07:06,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:07:06,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:07:06,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,773 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,773 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:07:06,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:07:06,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:07:06,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:07:06,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (1/1) ... [2023-11-17 16:07:06,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:07:06,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:07:06,836 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) [2023-11-17 16:07:06,841 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 [2023-11-17 16:07:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:07:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:07:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:07:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:07:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:07:06,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:07:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:07:06,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:07:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:07:06,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:07:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:07:06,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:07:06,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:07:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-17 16:07:06,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-17 16:07:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-17 16:07:06,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-17 16:07:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2023-11-17 16:07:06,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2023-11-17 16:07:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread8 [2023-11-17 16:07:06,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread8 [2023-11-17 16:07:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:07:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:07:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:07:06,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:07:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:07:06,880 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:07:06,991 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:07:06,995 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:07:07,394 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:07:07,485 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:07:07,486 INFO L307 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-17 16:07:07,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:07:07 BoogieIcfgContainer [2023-11-17 16:07:07,487 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:07:07,488 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:07:07,492 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:07:07,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:07:07,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:07:06" (1/3) ... [2023-11-17 16:07:07,495 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49363856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:07:07, skipping insertion in model container [2023-11-17 16:07:07,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:07:06" (2/3) ... [2023-11-17 16:07:07,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49363856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:07:07, skipping insertion in model container [2023-11-17 16:07:07,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:07:07" (3/3) ... [2023-11-17 16:07:07,497 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-8.wvr.c [2023-11-17 16:07:07,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:07:07,511 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:07:07,511 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:07:07,604 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-17 16:07:07,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 250 transitions, 556 flow [2023-11-17 16:07:07,741 INFO L124 PetriNetUnfolderBase]: 2/242 cut-off events. [2023-11-17 16:07:07,741 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 16:07:07,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 242 events. 2/242 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 130 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 192. Up to 2 conditions per place. [2023-11-17 16:07:07,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 250 transitions, 556 flow [2023-11-17 16:07:07,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 221 transitions, 490 flow [2023-11-17 16:07:07,756 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:07:07,775 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 221 transitions, 490 flow [2023-11-17 16:07:07,777 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 221 transitions, 490 flow [2023-11-17 16:07:07,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 221 transitions, 490 flow [2023-11-17 16:07:07,827 INFO L124 PetriNetUnfolderBase]: 2/221 cut-off events. [2023-11-17 16:07:07,827 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 16:07:07,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 221 events. 2/221 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 129 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 192. Up to 2 conditions per place. [2023-11-17 16:07:07,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 6796 [2023-11-17 16:07:18,988 INFO L134 LiptonReduction]: Checked pairs total: 13944 [2023-11-17 16:07:18,989 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-11-17 16:07:19,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:07:19,010 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=LoopHeads, 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;@4c64d81f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:07:19,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 16:07:19,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:07:19,017 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2023-11-17 16:07:19,017 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 16:07:19,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:07:19,017 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] [2023-11-17 16:07:19,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 16:07:19,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:07:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1396510241, now seen corresponding path program 1 times [2023-11-17 16:07:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:07:19,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915979928] [2023-11-17 16:07:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:07:19,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:07:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:07:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:07:20,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:07:20,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915979928] [2023-11-17 16:07:20,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915979928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:07:20,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:07:20,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:07:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892922761] [2023-11-17 16:07:20,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:07:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:07:20,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:07:20,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:07:20,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:07:20,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-11-17 16:07:20,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 50 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 200.33333333333334) internal successors, (1202), 6 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:20,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:07:20,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-11-17 16:07:20,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:07:39,093 INFO L124 PetriNetUnfolderBase]: 232377/283581 cut-off events. [2023-11-17 16:07:39,094 INFO L125 PetriNetUnfolderBase]: For 19935/19935 co-relation queries the response was YES. [2023-11-17 16:07:39,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586214 conditions, 283581 events. 232377/283581 cut-off events. For 19935/19935 co-relation queries the response was YES. Maximal size of possible extension queue 5667. Compared 1404151 event pairs, 65501 based on Foata normal form. 1/283582 useless extension candidates. Maximal degree in co-relation 462248. Up to 136160 conditions per place. [2023-11-17 16:07:40,627 INFO L140 encePairwiseOnDemand]: 420/431 looper letters, 118 selfloop transitions, 17 changer transitions 16/151 dead transitions. [2023-11-17 16:07:40,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 151 transitions, 733 flow [2023-11-17 16:07:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:07:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:07:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1112 transitions. [2023-11-17 16:07:40,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160092807424594 [2023-11-17 16:07:40,641 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1112 transitions. [2023-11-17 16:07:40,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1112 transitions. [2023-11-17 16:07:40,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:07:40,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1112 transitions. [2023-11-17 16:07:40,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.4) internal successors, (1112), 5 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:40,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:40,660 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:40,662 INFO L175 Difference]: Start difference. First operand has 75 places, 50 transitions, 148 flow. Second operand 5 states and 1112 transitions. [2023-11-17 16:07:40,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 151 transitions, 733 flow [2023-11-17 16:07:41,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 151 transitions, 647 flow, removed 0 selfloop flow, removed 16 redundant places. [2023-11-17 16:07:41,963 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 237 flow [2023-11-17 16:07:41,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2023-11-17 16:07:41,967 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -9 predicate places. [2023-11-17 16:07:41,967 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 237 flow [2023-11-17 16:07:41,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.33333333333334) internal successors, (1202), 6 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:41,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:07:41,968 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] [2023-11-17 16:07:41,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:07:41,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 16:07:41,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:07:41,969 INFO L85 PathProgramCache]: Analyzing trace with hash 510050833, now seen corresponding path program 2 times [2023-11-17 16:07:41,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:07:41,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499692239] [2023-11-17 16:07:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:07:41,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:07:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:07:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:07:42,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:07:42,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499692239] [2023-11-17 16:07:42,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499692239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:07:42,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:07:42,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:07:42,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352857948] [2023-11-17 16:07:42,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:07:42,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:07:42,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:07:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:07:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:07:42,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-11-17 16:07:42,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 200.33333333333334) internal successors, (1202), 6 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:42,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:07:42,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-11-17 16:07:42,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:07:58,643 INFO L124 PetriNetUnfolderBase]: 226327/277531 cut-off events. [2023-11-17 16:07:58,643 INFO L125 PetriNetUnfolderBase]: For 92129/92129 co-relation queries the response was YES. [2023-11-17 16:07:59,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800567 conditions, 277531 events. 226327/277531 cut-off events. For 92129/92129 co-relation queries the response was YES. Maximal size of possible extension queue 5830. Compared 1409554 event pairs, 45903 based on Foata normal form. 1/277532 useless extension candidates. Maximal degree in co-relation 496906. Up to 132544 conditions per place. [2023-11-17 16:07:59,960 INFO L140 encePairwiseOnDemand]: 420/431 looper letters, 138 selfloop transitions, 24 changer transitions 25/187 dead transitions. [2023-11-17 16:07:59,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 187 transitions, 975 flow [2023-11-17 16:07:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:07:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:07:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1333 transitions. [2023-11-17 16:07:59,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154679040989946 [2023-11-17 16:07:59,964 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1333 transitions. [2023-11-17 16:07:59,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1333 transitions. [2023-11-17 16:07:59,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:07:59,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1333 transitions. [2023-11-17 16:07:59,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 222.16666666666666) internal successors, (1333), 6 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:59,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 431.0) internal successors, (3017), 7 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:59,972 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 431.0) internal successors, (3017), 7 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:59,973 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 237 flow. Second operand 6 states and 1333 transitions. [2023-11-17 16:07:59,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 187 transitions, 975 flow [2023-11-17 16:08:00,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 187 transitions, 956 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:00,039 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 365 flow [2023-11-17 16:08:00,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-11-17 16:08:00,040 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2023-11-17 16:08:00,040 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 365 flow [2023-11-17 16:08:00,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.33333333333334) internal successors, (1202), 6 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:00,041 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] [2023-11-17 16:08:00,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:08:00,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 16:08:00,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash -61537381, now seen corresponding path program 3 times [2023-11-17 16:08:00,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:00,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576466582] [2023-11-17 16:08:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:00,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:00,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:00,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576466582] [2023-11-17 16:08:00,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576466582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:00,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:00,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:08:00,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798261932] [2023-11-17 16:08:00,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:00,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:00,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:08:00,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 431 [2023-11-17 16:08:00,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:00,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:00,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 431 [2023-11-17 16:08:00,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand