./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind3-100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-theta/unwind3-100.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51e84781857cfc73ae131a38742d9d6222707e54f6a010e2853f82c7770f5a96 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:57:57,423 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:57:57,476 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:57:57,482 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:57:57,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:57:57,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:57:57,496 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:57:57,496 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:57:57,497 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:57:57,497 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:57:57,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:57:57,498 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:57:57,498 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:57:57,500 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:57:57,500 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:57:57,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:57:57,500 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:57:57,501 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:57:57,501 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:57:57,501 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:57:57,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:57:57,502 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:57:57,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:57:57,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:57:57,502 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:57:57,503 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:57:57,503 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:57:57,503 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:57:57,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:57:57,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:57:57,504 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:57:57,504 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:57:57,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:57:57,504 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:57:57,505 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:57:57,505 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:57:57,505 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:57:57,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:57:57,505 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:57:57,506 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:57:57,506 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:57:57,506 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:57:57,506 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51e84781857cfc73ae131a38742d9d6222707e54f6a010e2853f82c7770f5a96 [2024-11-19 01:57:57,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:57:57,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:57:57,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:57:57,741 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:57:57,741 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:57:57,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind3-100.i [2024-11-19 01:57:58,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:57:59,223 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:57:59,224 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-100.i [2024-11-19 01:57:59,241 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8cf63662/f3f8d62aa3a942e097c93e48bdbf1bd1/FLAG6e7423486 [2024-11-19 01:57:59,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8cf63662/f3f8d62aa3a942e097c93e48bdbf1bd1 [2024-11-19 01:57:59,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:57:59,259 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:57:59,260 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:57:59,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:57:59,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:57:59,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b265ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59, skipping insertion in model container [2024-11-19 01:57:59,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,306 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:57:59,613 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-100.i[33026,33039] [2024-11-19 01:57:59,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:57:59,633 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:57:59,672 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-100.i[33026,33039] [2024-11-19 01:57:59,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:57:59,702 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:57:59,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59 WrapperNode [2024-11-19 01:57:59,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:57:59,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:57:59,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:57:59,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:57:59,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,742 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-11-19 01:57:59,743 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:57:59,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:57:59,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:57:59,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:57:59,751 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,754 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,762 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 01:57:59,765 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,765 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,770 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:57:59,779 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:57:59,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:57:59,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:57:59,779 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (1/1) ... [2024-11-19 01:57:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:57:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:59,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 01:57:59,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 01:57:59,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:57:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-19 01:57:59,853 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-19 01:57:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-19 01:57:59,853 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-19 01:57:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:57:59,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:57:59,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:57:59,856 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:57:59,974 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:57:59,976 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:58:00,095 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:58:00,095 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:58:00,167 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:58:00,168 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 01:58:00,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:58:00 BoogieIcfgContainer [2024-11-19 01:58:00,168 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:58:00,169 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:58:00,170 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:58:00,175 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:58:00,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:57:59" (1/3) ... [2024-11-19 01:58:00,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aac74ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:58:00, skipping insertion in model container [2024-11-19 01:58:00,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:59" (2/3) ... [2024-11-19 01:58:00,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aac74ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:58:00, skipping insertion in model container [2024-11-19 01:58:00,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:58:00" (3/3) ... [2024-11-19 01:58:00,177 INFO L112 eAbstractionObserver]: Analyzing ICFG unwind3-100.i [2024-11-19 01:58:00,189 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:58:00,189 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:58:00,189 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:58:00,219 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:58:00,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 52 flow [2024-11-19 01:58:00,264 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-19 01:58:00,264 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:58:00,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 4/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 18. Up to 4 conditions per place. [2024-11-19 01:58:00,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 22 transitions, 52 flow [2024-11-19 01:58:00,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 43 flow [2024-11-19 01:58:00,283 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:58:00,290 INFO L333 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, 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;@7899558f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:58:00,291 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-19 01:58:00,302 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:58:00,306 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2024-11-19 01:58:00,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:58:00,306 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:00,307 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:00,307 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-19 01:58:00,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:00,312 INFO L85 PathProgramCache]: Analyzing trace with hash -448857358, now seen corresponding path program 1 times [2024-11-19 01:58:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:00,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125857261] [2024-11-19 01:58:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:00,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:00,413 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:58:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:00,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:58:00,445 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:58:00,446 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-19 01:58:00,447 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2024-11-19 01:58:00,447 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-19 01:58:00,447 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-19 01:58:00,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:58:00,448 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-19 01:58:00,451 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:58:00,451 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-19 01:58:00,481 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:58:00,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 90 flow [2024-11-19 01:58:00,498 INFO L124 PetriNetUnfolderBase]: 6/50 cut-off events. [2024-11-19 01:58:00,499 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:58:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 50 events. 6/50 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 122 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 61. Up to 6 conditions per place. [2024-11-19 01:58:00,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 90 flow [2024-11-19 01:58:00,501 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 57 flow [2024-11-19 01:58:00,502 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:58:00,504 INFO L333 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, 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;@7899558f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:58:00,505 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-19 01:58:00,514 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:58:00,515 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-19 01:58:00,515 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:58:00,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:00,515 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:00,515 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-19 01:58:00,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1216880788, now seen corresponding path program 1 times [2024-11-19 01:58:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:00,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121837403] [2024-11-19 01:58:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:00,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:00,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:00,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121837403] [2024-11-19 01:58:00,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121837403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:00,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:00,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:58:00,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113682120] [2024-11-19 01:58:00,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:00,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:58:00,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:58:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:58:00,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-11-19 01:58:00,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:00,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:00,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-11-19 01:58:00,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:00,828 INFO L124 PetriNetUnfolderBase]: 180/365 cut-off events. [2024-11-19 01:58:00,828 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-19 01:58:00,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 365 events. 180/365 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1639 event pairs, 78 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 223. Up to 298 conditions per place. [2024-11-19 01:58:00,833 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-11-19 01:58:00,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 105 flow [2024-11-19 01:58:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:58:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:58:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-19 01:58:00,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-19 01:58:00,845 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 57 flow. Second operand 4 states and 65 transitions. [2024-11-19 01:58:00,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 105 flow [2024-11-19 01:58:00,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:58:00,850 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 70 flow [2024-11-19 01:58:00,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2024-11-19 01:58:00,854 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-11-19 01:58:00,854 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 70 flow [2024-11-19 01:58:00,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:00,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:00,855 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:00,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:58:00,855 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-19 01:58:00,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1784255260, now seen corresponding path program 1 times [2024-11-19 01:58:00,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:00,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249593322] [2024-11-19 01:58:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:00,882 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:58:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:00,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:58:00,899 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:58:00,899 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-19 01:58:00,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2024-11-19 01:58:00,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-19 01:58:00,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-19 01:58:00,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-19 01:58:00,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:58:00,900 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-19 01:58:00,901 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:58:00,901 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-19 01:58:00,927 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:58:00,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 48 transitions, 132 flow [2024-11-19 01:58:00,939 INFO L124 PetriNetUnfolderBase]: 8/67 cut-off events. [2024-11-19 01:58:00,940 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-19 01:58:00,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 67 events. 8/67 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 187 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 84. Up to 8 conditions per place. [2024-11-19 01:58:00,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 48 transitions, 132 flow [2024-11-19 01:58:00,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 26 transitions, 73 flow [2024-11-19 01:58:00,943 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:58:00,943 INFO L333 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, 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;@7899558f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:58:00,944 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-19 01:58:00,947 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:58:00,948 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-19 01:58:00,948 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:58:00,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:00,948 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:00,948 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:58:00,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:00,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1057345128, now seen corresponding path program 1 times [2024-11-19 01:58:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:00,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503598656] [2024-11-19 01:58:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:00,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:01,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:01,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503598656] [2024-11-19 01:58:01,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503598656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:01,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:01,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:58:01,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936836667] [2024-11-19 01:58:01,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:01,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:58:01,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:58:01,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:58:01,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-19 01:58:01,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:01,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:01,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-19 01:58:01,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:01,147 INFO L124 PetriNetUnfolderBase]: 810/1391 cut-off events. [2024-11-19 01:58:01,148 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-19 01:58:01,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2725 conditions, 1391 events. 810/1391 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7407 event pairs, 602 based on Foata normal form. 0/1271 useless extension candidates. Maximal degree in co-relation 907. Up to 1198 conditions per place. [2024-11-19 01:58:01,159 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 20 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-11-19 01:58:01,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 127 flow [2024-11-19 01:58:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:58:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:58:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-11-19 01:58:01,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-19 01:58:01,161 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 73 flow. Second operand 4 states and 84 transitions. [2024-11-19 01:58:01,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 127 flow [2024-11-19 01:58:01,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 01:58:01,164 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 84 flow [2024-11-19 01:58:01,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2024-11-19 01:58:01,166 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-19 01:58:01,166 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 84 flow [2024-11-19 01:58:01,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:01,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:01,167 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:01,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 01:58:01,169 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:58:01,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1227913786, now seen corresponding path program 1 times [2024-11-19 01:58:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:01,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420467121] [2024-11-19 01:58:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:01,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:01,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420467121] [2024-11-19 01:58:01,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420467121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:01,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:01,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:58:01,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579966417] [2024-11-19 01:58:01,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:01,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:58:01,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:01,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:58:01,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:58:01,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-19 01:58:01,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:01,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:01,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-19 01:58:01,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:01,493 INFO L124 PetriNetUnfolderBase]: 1335/2144 cut-off events. [2024-11-19 01:58:01,493 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-19 01:58:01,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4311 conditions, 2144 events. 1335/2144 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11628 event pairs, 907 based on Foata normal form. 78/2044 useless extension candidates. Maximal degree in co-relation 1564. Up to 1455 conditions per place. [2024-11-19 01:58:01,502 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 25 selfloop transitions, 3 changer transitions 8/43 dead transitions. [2024-11-19 01:58:01,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 188 flow [2024-11-19 01:58:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:58:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:58:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-11-19 01:58:01,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-11-19 01:58:01,505 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 84 flow. Second operand 5 states and 106 transitions. [2024-11-19 01:58:01,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 188 flow [2024-11-19 01:58:01,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:58:01,508 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 96 flow [2024-11-19 01:58:01,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2024-11-19 01:58:01,510 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-11-19 01:58:01,510 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 96 flow [2024-11-19 01:58:01,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:01,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:01,510 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:01,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 01:58:01,511 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:58:01,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash -589408817, now seen corresponding path program 1 times [2024-11-19 01:58:01,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:01,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970053942] [2024-11-19 01:58:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970053942] [2024-11-19 01:58:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970053942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:58:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351882811] [2024-11-19 01:58:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:01,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:58:01,582 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) [2024-11-19 01:58:01,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:58:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:01,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:58:01,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:58:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:01,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:58:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:01,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351882811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:58:01,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:58:01,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 01:58:01,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486242126] [2024-11-19 01:58:01,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:58:01,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:58:01,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:58:01,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:58:01,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-19 01:58:01,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 96 flow. Second operand has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:01,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:01,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-19 01:58:01,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:01,842 INFO L124 PetriNetUnfolderBase]: 178/330 cut-off events. [2024-11-19 01:58:01,843 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-19 01:58:01,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 330 events. 178/330 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1356 event pairs, 13 based on Foata normal form. 39/369 useless extension candidates. Maximal degree in co-relation 707. Up to 162 conditions per place. [2024-11-19 01:58:01,845 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 25 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-11-19 01:58:01,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 156 flow [2024-11-19 01:58:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:58:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:58:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-11-19 01:58:01,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-11-19 01:58:01,847 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 96 flow. Second operand 7 states and 138 transitions. [2024-11-19 01:58:01,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 156 flow [2024-11-19 01:58:01,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:58:01,849 INFO L231 Difference]: Finished difference. Result has 36 places, 20 transitions, 75 flow [2024-11-19 01:58:01,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=20} [2024-11-19 01:58:01,849 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2024-11-19 01:58:01,849 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 20 transitions, 75 flow [2024-11-19 01:58:01,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:01,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:01,850 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:01,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:58:02,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-19 01:58:02,052 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:58:02,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2049460721, now seen corresponding path program 1 times [2024-11-19 01:58:02,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:02,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140650421] [2024-11-19 01:58:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:02,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:02,064 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:58:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:02,073 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:58:02,073 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:58:02,073 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-19 01:58:02,073 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-19 01:58:02,074 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-19 01:58:02,074 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-19 01:58:02,074 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-19 01:58:02,074 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-19 01:58:02,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 01:58:02,074 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-19 01:58:02,075 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:58:02,075 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-19 01:58:02,111 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:58:02,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 61 transitions, 178 flow [2024-11-19 01:58:02,117 INFO L124 PetriNetUnfolderBase]: 10/84 cut-off events. [2024-11-19 01:58:02,117 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-19 01:58:02,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 84 events. 10/84 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 244 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 108. Up to 10 conditions per place. [2024-11-19 01:58:02,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 61 transitions, 178 flow [2024-11-19 01:58:02,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 30 transitions, 91 flow [2024-11-19 01:58:02,119 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:58:02,119 INFO L333 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, 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;@7899558f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:58:02,119 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-19 01:58:02,121 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:58:02,121 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-19 01:58:02,121 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:58:02,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:02,121 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:02,121 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-19 01:58:02,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1528182001, now seen corresponding path program 1 times [2024-11-19 01:58:02,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:02,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89269579] [2024-11-19 01:58:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:02,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:02,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:02,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89269579] [2024-11-19 01:58:02,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89269579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:02,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:02,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:58:02,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508092482] [2024-11-19 01:58:02,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:02,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:58:02,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:58:02,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:58:02,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-19 01:58:02,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:02,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:02,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-19 01:58:02,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:02,481 INFO L124 PetriNetUnfolderBase]: 3240/5027 cut-off events. [2024-11-19 01:58:02,481 INFO L125 PetriNetUnfolderBase]: For 498/498 co-relation queries the response was YES. [2024-11-19 01:58:02,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9899 conditions, 5027 events. 3240/5027 cut-off events. For 498/498 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29580 event pairs, 2202 based on Foata normal form. 0/4664 useless extension candidates. Maximal degree in co-relation 3436. Up to 4438 conditions per place. [2024-11-19 01:58:02,502 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 23 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-19 01:58:02,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 34 transitions, 151 flow [2024-11-19 01:58:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:58:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:58:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-19 01:58:02,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42213114754098363 [2024-11-19 01:58:02,504 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 91 flow. Second operand 4 states and 103 transitions. [2024-11-19 01:58:02,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 34 transitions, 151 flow [2024-11-19 01:58:02,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 34 transitions, 144 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-19 01:58:02,507 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 98 flow [2024-11-19 01:58:02,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2024-11-19 01:58:02,508 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-11-19 01:58:02,508 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 98 flow [2024-11-19 01:58:02,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:02,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:02,509 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:02,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 01:58:02,509 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-19 01:58:02,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:02,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1631634011, now seen corresponding path program 1 times [2024-11-19 01:58:02,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:02,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900241066] [2024-11-19 01:58:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:02,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:02,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900241066] [2024-11-19 01:58:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900241066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:02,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:02,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:58:02,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146710638] [2024-11-19 01:58:02,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:02,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:58:02,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:58:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:58:02,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-11-19 01:58:02,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:02,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:02,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-11-19 01:58:02,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:03,098 INFO L124 PetriNetUnfolderBase]: 5304/7819 cut-off events. [2024-11-19 01:58:03,099 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-11-19 01:58:03,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15657 conditions, 7819 events. 5304/7819 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46245 event pairs, 3688 based on Foata normal form. 240/7557 useless extension candidates. Maximal degree in co-relation 15620. Up to 5370 conditions per place. [2024-11-19 01:58:03,143 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 30 selfloop transitions, 3 changer transitions 10/51 dead transitions. [2024-11-19 01:58:03,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 224 flow [2024-11-19 01:58:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:58:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:58:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-11-19 01:58:03,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4360655737704918 [2024-11-19 01:58:03,145 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 98 flow. Second operand 5 states and 133 transitions. [2024-11-19 01:58:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 224 flow [2024-11-19 01:58:03,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:58:03,147 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 110 flow [2024-11-19 01:58:03,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2024-11-19 01:58:03,147 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-11-19 01:58:03,147 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 110 flow [2024-11-19 01:58:03,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:03,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:03,148 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:03,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 01:58:03,148 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-19 01:58:03,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash -958983658, now seen corresponding path program 1 times [2024-11-19 01:58:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:03,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039710719] [2024-11-19 01:58:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039710719] [2024-11-19 01:58:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039710719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:58:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076038855] [2024-11-19 01:58:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:03,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:58:03,232 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) [2024-11-19 01:58:03,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:58:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:03,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:58:03,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:58:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:03,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:58:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:03,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076038855] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:58:03,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:58:03,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 01:58:03,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194302376] [2024-11-19 01:58:03,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:58:03,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:58:03,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:58:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:58:03,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-11-19 01:58:03,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 110 flow. Second operand has 10 states, 10 states have (on average 21.1) internal successors, (211), 10 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:03,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:03,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-11-19 01:58:03,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:03,702 INFO L124 PetriNetUnfolderBase]: 3121/4659 cut-off events. [2024-11-19 01:58:03,703 INFO L125 PetriNetUnfolderBase]: For 865/865 co-relation queries the response was YES. [2024-11-19 01:58:03,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10338 conditions, 4659 events. 3121/4659 cut-off events. For 865/865 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25157 event pairs, 529 based on Foata normal form. 39/4536 useless extension candidates. Maximal degree in co-relation 9842. Up to 3376 conditions per place. [2024-11-19 01:58:03,729 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 43 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-19 01:58:03,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 266 flow [2024-11-19 01:58:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:58:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:58:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-11-19 01:58:03,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4332552693208431 [2024-11-19 01:58:03,731 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 110 flow. Second operand 7 states and 185 transitions. [2024-11-19 01:58:03,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 266 flow [2024-11-19 01:58:03,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 258 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 01:58:03,747 INFO L231 Difference]: Finished difference. Result has 54 places, 35 transitions, 145 flow [2024-11-19 01:58:03,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=145, PETRI_PLACES=54, PETRI_TRANSITIONS=35} [2024-11-19 01:58:03,749 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-11-19 01:58:03,749 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 35 transitions, 145 flow [2024-11-19 01:58:03,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.1) internal successors, (211), 10 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:03,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:03,750 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:03,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 01:58:03,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 01:58:03,954 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-19 01:58:03,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:03,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1148699942, now seen corresponding path program 1 times [2024-11-19 01:58:03,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:03,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575893250] [2024-11-19 01:58:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:03,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:03,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:58:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:03,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:58:03,978 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:58:03,979 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-19 01:58:03,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2024-11-19 01:58:03,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-19 01:58:03,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-19 01:58:03,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-19 01:58:03,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-19 01:58:03,979 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-19 01:58:03,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 01:58:03,979 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-19 01:58:03,980 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:58:03,980 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-19 01:58:04,013 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:58:04,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 74 transitions, 228 flow [2024-11-19 01:58:04,023 INFO L124 PetriNetUnfolderBase]: 12/101 cut-off events. [2024-11-19 01:58:04,023 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-19 01:58:04,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 101 events. 12/101 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 309 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 133. Up to 12 conditions per place. [2024-11-19 01:58:04,023 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 74 transitions, 228 flow [2024-11-19 01:58:04,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 34 transitions, 111 flow [2024-11-19 01:58:04,025 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:58:04,025 INFO L333 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, 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;@7899558f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:58:04,025 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-19 01:58:04,027 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:58:04,027 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-19 01:58:04,027 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:58:04,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:04,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:04,027 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-19 01:58:04,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:04,028 INFO L85 PathProgramCache]: Analyzing trace with hash 195137287, now seen corresponding path program 1 times [2024-11-19 01:58:04,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:04,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488035281] [2024-11-19 01:58:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:04,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:04,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:04,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488035281] [2024-11-19 01:58:04,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488035281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:04,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:04,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:58:04,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8292468] [2024-11-19 01:58:04,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:04,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:58:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:58:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:58:04,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-11-19 01:58:04,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:04,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:04,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-11-19 01:58:04,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:05,117 INFO L124 PetriNetUnfolderBase]: 12150/17567 cut-off events. [2024-11-19 01:58:05,118 INFO L125 PetriNetUnfolderBase]: For 2415/2415 co-relation queries the response was YES. [2024-11-19 01:58:05,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34752 conditions, 17567 events. 12150/17567 cut-off events. For 2415/2415 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 110838 event pairs, 10214 based on Foata normal form. 0/16472 useless extension candidates. Maximal degree in co-relation 12409. Up to 15778 conditions per place. [2024-11-19 01:58:05,209 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 26 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-11-19 01:58:05,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 38 transitions, 177 flow [2024-11-19 01:58:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:58:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:58:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-11-19 01:58:05,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-19 01:58:05,211 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 111 flow. Second operand 4 states and 122 transitions. [2024-11-19 01:58:05,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 38 transitions, 177 flow [2024-11-19 01:58:05,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 38 transitions, 164 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 01:58:05,219 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 112 flow [2024-11-19 01:58:05,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2024-11-19 01:58:05,221 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2024-11-19 01:58:05,221 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 112 flow [2024-11-19 01:58:05,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:05,222 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:05,222 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:05,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 01:58:05,223 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-19 01:58:05,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:05,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1764308540, now seen corresponding path program 1 times [2024-11-19 01:58:05,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:05,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780599965] [2024-11-19 01:58:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:05,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780599965] [2024-11-19 01:58:05,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780599965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:05,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:05,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:58:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524542938] [2024-11-19 01:58:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:05,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:58:05,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:58:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:58:05,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 74 [2024-11-19 01:58:05,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:05,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:05,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 74 [2024-11-19 01:58:05,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:06,904 INFO L124 PetriNetUnfolderBase]: 19803/27394 cut-off events. [2024-11-19 01:58:06,904 INFO L125 PetriNetUnfolderBase]: For 1575/1575 co-relation queries the response was YES. [2024-11-19 01:58:06,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54835 conditions, 27394 events. 19803/27394 cut-off events. For 1575/1575 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 169336 event pairs, 13975 based on Foata normal form. 726/26646 useless extension candidates. Maximal degree in co-relation 54797. Up to 19059 conditions per place. [2024-11-19 01:58:07,052 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 35 selfloop transitions, 3 changer transitions 12/59 dead transitions. [2024-11-19 01:58:07,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 260 flow [2024-11-19 01:58:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:58:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:58:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-19 01:58:07,054 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-11-19 01:58:07,054 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 112 flow. Second operand 5 states and 160 transitions. [2024-11-19 01:58:07,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 260 flow [2024-11-19 01:58:07,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:58:07,056 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 124 flow [2024-11-19 01:58:07,057 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2024-11-19 01:58:07,057 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2024-11-19 01:58:07,057 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 124 flow [2024-11-19 01:58:07,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:07,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:07,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:07,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 01:58:07,058 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-19 01:58:07,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1141040494, now seen corresponding path program 1 times [2024-11-19 01:58:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:07,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459678888] [2024-11-19 01:58:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:07,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:07,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:07,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459678888] [2024-11-19 01:58:07,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459678888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:58:07,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717229625] [2024-11-19 01:58:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:07,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:07,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:58:07,114 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) [2024-11-19 01:58:07,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:58:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:07,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:58:07,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:58:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:07,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:58:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:07,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717229625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:58:07,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:58:07,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 01:58:07,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162274707] [2024-11-19 01:58:07,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:58:07,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:58:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:58:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:58:07,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 74 [2024-11-19 01:58:07,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 25.1) internal successors, (251), 10 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:07,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 74 [2024-11-19 01:58:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:08,434 INFO L124 PetriNetUnfolderBase]: 13894/19482 cut-off events. [2024-11-19 01:58:08,434 INFO L125 PetriNetUnfolderBase]: For 2613/2613 co-relation queries the response was YES. [2024-11-19 01:58:08,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42982 conditions, 19482 events. 13894/19482 cut-off events. For 2613/2613 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 117140 event pairs, 2601 based on Foata normal form. 39/18873 useless extension candidates. Maximal degree in co-relation 41027. Up to 15121 conditions per place. [2024-11-19 01:58:08,554 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 48 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-19 01:58:08,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 294 flow [2024-11-19 01:58:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:58:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:58:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-11-19 01:58:08,557 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42084942084942084 [2024-11-19 01:58:08,557 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 124 flow. Second operand 7 states and 218 transitions. [2024-11-19 01:58:08,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 294 flow [2024-11-19 01:58:08,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 286 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 01:58:08,719 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 159 flow [2024-11-19 01:58:08,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2024-11-19 01:58:08,719 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2024-11-19 01:58:08,720 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 159 flow [2024-11-19 01:58:08,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.1) internal successors, (251), 10 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:08,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:08,720 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:08,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 01:58:08,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:08,921 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-19 01:58:08,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash -381750096, now seen corresponding path program 1 times [2024-11-19 01:58:08,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:08,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737297453] [2024-11-19 01:58:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:08,936 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:58:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:08,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:58:08,957 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:58:08,957 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-19 01:58:08,957 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 8 remaining) [2024-11-19 01:58:08,957 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-11-19 01:58:08,957 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-11-19 01:58:08,959 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-11-19 01:58:08,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-11-19 01:58:08,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-11-19 01:58:08,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-11-19 01:58:08,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 01:58:08,960 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-19 01:58:08,961 WARN L244 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:58:08,961 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-19 01:58:09,002 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:58:09,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 87 transitions, 282 flow [2024-11-19 01:58:09,013 INFO L124 PetriNetUnfolderBase]: 14/118 cut-off events. [2024-11-19 01:58:09,013 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-19 01:58:09,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 118 events. 14/118 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 372 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 159. Up to 14 conditions per place. [2024-11-19 01:58:09,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 87 transitions, 282 flow [2024-11-19 01:58:09,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 38 transitions, 133 flow [2024-11-19 01:58:09,015 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:58:09,015 INFO L333 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, 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;@7899558f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:58:09,015 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-19 01:58:09,017 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:58:09,018 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-19 01:58:09,018 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:58:09,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:09,018 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:09,018 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-19 01:58:09,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1354163370, now seen corresponding path program 1 times [2024-11-19 01:58:09,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:09,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605468186] [2024-11-19 01:58:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:09,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:09,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:09,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605468186] [2024-11-19 01:58:09,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605468186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:09,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:09,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:58:09,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877947241] [2024-11-19 01:58:09,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:09,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:58:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:58:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:58:09,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-19 01:58:09,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:09,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:09,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-19 01:58:09,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:12,480 INFO L124 PetriNetUnfolderBase]: 43740/59999 cut-off events. [2024-11-19 01:58:12,480 INFO L125 PetriNetUnfolderBase]: For 10329/10329 co-relation queries the response was YES. [2024-11-19 01:58:12,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119224 conditions, 59999 events. 43740/59999 cut-off events. For 10329/10329 co-relation queries the response was YES. Maximal size of possible extension queue 2484. Compared 392492 event pairs, 37916 based on Foata normal form. 0/56720 useless extension candidates. Maximal degree in co-relation 43423. Up to 54658 conditions per place. [2024-11-19 01:58:12,768 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 29 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-19 01:58:12,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 42 transitions, 205 flow [2024-11-19 01:58:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:58:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:58:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-19 01:58:12,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-11-19 01:58:12,769 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 133 flow. Second operand 4 states and 141 transitions. [2024-11-19 01:58:12,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 42 transitions, 205 flow [2024-11-19 01:58:12,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 42 transitions, 184 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-19 01:58:12,830 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 126 flow [2024-11-19 01:58:12,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2024-11-19 01:58:12,831 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-11-19 01:58:12,831 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 126 flow [2024-11-19 01:58:12,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:12,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:12,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:12,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 01:58:12,832 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-19 01:58:12,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1626922461, now seen corresponding path program 1 times [2024-11-19 01:58:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:12,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721193933] [2024-11-19 01:58:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:12,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:12,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721193933] [2024-11-19 01:58:12,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721193933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:12,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:12,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:58:12,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371080055] [2024-11-19 01:58:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:12,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:58:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:12,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:58:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:58:12,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-11-19 01:58:12,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:12,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:12,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-11-19 01:58:12,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:18,127 INFO L124 PetriNetUnfolderBase]: 71076/93883 cut-off events. [2024-11-19 01:58:18,127 INFO L125 PetriNetUnfolderBase]: For 5931/5931 co-relation queries the response was YES. [2024-11-19 01:58:18,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187907 conditions, 93883 events. 71076/93883 cut-off events. For 5931/5931 co-relation queries the response was YES. Maximal size of possible extension queue 3472. Compared 597807 event pairs, 50668 based on Foata normal form. 2184/91677 useless extension candidates. Maximal degree in co-relation 187868. Up to 65958 conditions per place. [2024-11-19 01:58:18,925 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 40 selfloop transitions, 3 changer transitions 14/67 dead transitions. [2024-11-19 01:58:18,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 296 flow [2024-11-19 01:58:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:58:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:58:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-11-19 01:58:18,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4298850574712644 [2024-11-19 01:58:18,930 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 126 flow. Second operand 5 states and 187 transitions. [2024-11-19 01:58:18,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 296 flow [2024-11-19 01:58:18,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:58:18,940 INFO L231 Difference]: Finished difference. Result has 60 places, 40 transitions, 138 flow [2024-11-19 01:58:18,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=60, PETRI_TRANSITIONS=40} [2024-11-19 01:58:18,940 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-11-19 01:58:18,940 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 40 transitions, 138 flow [2024-11-19 01:58:18,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:18,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:18,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:18,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 01:58:18,941 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-19 01:58:18,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:18,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1105041565, now seen corresponding path program 1 times [2024-11-19 01:58:18,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:18,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557312396] [2024-11-19 01:58:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:18,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:18,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:18,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557312396] [2024-11-19 01:58:18,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557312396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:58:18,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718434669] [2024-11-19 01:58:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:18,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:18,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:58:18,977 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) [2024-11-19 01:58:18,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:58:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:19,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:58:19,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:58:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:19,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:58:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:19,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718434669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:58:19,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:58:19,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 01:58:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7682290] [2024-11-19 01:58:19,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:58:19,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:58:19,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:58:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:58:19,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-19 01:58:19,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 40 transitions, 138 flow. Second operand has 10 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:19,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:19,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-19 01:58:19,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:22,927 INFO L124 PetriNetUnfolderBase]: 52045/69216 cut-off events. [2024-11-19 01:58:22,927 INFO L125 PetriNetUnfolderBase]: For 16360/16360 co-relation queries the response was YES. [2024-11-19 01:58:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151523 conditions, 69216 events. 52045/69216 cut-off events. For 16360/16360 co-relation queries the response was YES. Maximal size of possible extension queue 2598. Compared 417540 event pairs, 13489 based on Foata normal form. 39/67149 useless extension candidates. Maximal degree in co-relation 146651. Up to 55216 conditions per place. [2024-11-19 01:58:23,408 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 53 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-19 01:58:23,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 322 flow [2024-11-19 01:58:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:58:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:58:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 251 transitions. [2024-11-19 01:58:23,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4121510673234811 [2024-11-19 01:58:23,409 INFO L175 Difference]: Start difference. First operand has 60 places, 40 transitions, 138 flow. Second operand 7 states and 251 transitions. [2024-11-19 01:58:23,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 322 flow [2024-11-19 01:58:24,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 70 transitions, 314 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 01:58:24,514 INFO L231 Difference]: Finished difference. Result has 66 places, 43 transitions, 173 flow [2024-11-19 01:58:24,514 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=66, PETRI_TRANSITIONS=43} [2024-11-19 01:58:24,515 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2024-11-19 01:58:24,515 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 43 transitions, 173 flow [2024-11-19 01:58:24,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:24,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:24,515 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:24,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:58:24,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 01:58:24,716 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-19 01:58:24,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1026080248, now seen corresponding path program 1 times [2024-11-19 01:58:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:24,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689260170] [2024-11-19 01:58:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:24,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:24,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:24,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689260170] [2024-11-19 01:58:24,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689260170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:58:24,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180527053] [2024-11-19 01:58:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:24,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:24,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:58:24,799 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) [2024-11-19 01:58:24,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:58:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:24,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 01:58:24,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:58:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:24,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:58:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:58:25,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180527053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:58:25,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:58:25,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-19 01:58:25,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720349333] [2024-11-19 01:58:25,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:58:25,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:58:25,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:25,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:58:25,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:58:25,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 87 [2024-11-19 01:58:25,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 43 transitions, 173 flow. Second operand has 19 states, 19 states have (on average 29.526315789473685) internal successors, (561), 19 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:25,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:25,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 87 [2024-11-19 01:58:25,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:26,217 INFO L124 PetriNetUnfolderBase]: 11302/15675 cut-off events. [2024-11-19 01:58:26,217 INFO L125 PetriNetUnfolderBase]: For 18300/18300 co-relation queries the response was YES. [2024-11-19 01:58:26,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36785 conditions, 15675 events. 11302/15675 cut-off events. For 18300/18300 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 89986 event pairs, 144 based on Foata normal form. 1053/16728 useless extension candidates. Maximal degree in co-relation 36770. Up to 7290 conditions per place. [2024-11-19 01:58:26,289 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 67 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-11-19 01:58:26,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 413 flow [2024-11-19 01:58:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 01:58:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 01:58:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 348 transitions. [2024-11-19 01:58:26,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-19 01:58:26,290 INFO L175 Difference]: Start difference. First operand has 66 places, 43 transitions, 173 flow. Second operand 10 states and 348 transitions. [2024-11-19 01:58:26,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 413 flow [2024-11-19 01:58:26,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 387 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-19 01:58:26,314 INFO L231 Difference]: Finished difference. Result has 59 places, 36 transitions, 147 flow [2024-11-19 01:58:26,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=147, PETRI_PLACES=59, PETRI_TRANSITIONS=36} [2024-11-19 01:58:26,314 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2024-11-19 01:58:26,314 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 36 transitions, 147 flow [2024-11-19 01:58:26,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 29.526315789473685) internal successors, (561), 19 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:26,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:26,315 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:26,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 01:58:26,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:26,519 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-19 01:58:26,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:26,519 INFO L85 PathProgramCache]: Analyzing trace with hash 798171100, now seen corresponding path program 1 times [2024-11-19 01:58:26,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:26,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640561019] [2024-11-19 01:58:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:26,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:26,527 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:58:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:26,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:58:26,535 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 9 remaining) [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2024-11-19 01:58:26,536 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-11-19 01:58:26,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 01:58:26,537 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-19 01:58:26,537 WARN L244 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:58:26,537 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2024-11-19 01:58:26,572 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:58:26,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 100 transitions, 340 flow [2024-11-19 01:58:26,579 INFO L124 PetriNetUnfolderBase]: 16/135 cut-off events. [2024-11-19 01:58:26,579 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-19 01:58:26,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 135 events. 16/135 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 429 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 186. Up to 16 conditions per place. [2024-11-19 01:58:26,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 100 transitions, 340 flow [2024-11-19 01:58:26,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 42 transitions, 157 flow [2024-11-19 01:58:26,581 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:58:26,581 INFO L333 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, 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;@7899558f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:58:26,581 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-19 01:58:26,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:58:26,583 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-19 01:58:26,583 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:58:26,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:26,583 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:26,583 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-11-19 01:58:26,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash 710785498, now seen corresponding path program 1 times [2024-11-19 01:58:26,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:26,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765719983] [2024-11-19 01:58:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:26,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:26,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765719983] [2024-11-19 01:58:26,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765719983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:26,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:26,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:58:26,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832029939] [2024-11-19 01:58:26,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:26,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:58:26,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:26,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:58:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:58:26,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2024-11-19 01:58:26,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:26,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:26,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2024-11-19 01:58:26,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand