./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 3289d67d 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.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:36:59,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:36:59,248 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:36:59,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:36:59,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:36:59,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:36:59,275 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:36:59,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:36:59,276 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:36:59,277 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:36:59,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:36:59,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:36:59,278 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:36:59,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:36:59,279 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:36:59,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:36:59,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:36:59,280 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:36:59,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:36:59,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:36:59,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:36:59,282 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:36:59,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:36:59,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:36:59,283 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:36:59,283 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:36:59,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:36:59,284 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:36:59,284 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:36:59,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:36:59,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:36:59,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:36:59,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:36:59,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:36:59,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:36:59,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:36:59,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:36:59,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:36:59,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:36:59,289 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:36:59,289 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:36:59,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:36:59,290 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51e84781857cfc73ae131a38742d9d6222707e54f6a010e2853f82c7770f5a96 [2024-11-16 19:36:59,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:36:59,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:36:59,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:36:59,579 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:36:59,580 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:36:59,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind3-100.i [2024-11-16 19:37:01,117 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:37:01,393 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:37:01,395 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind3-100.i [2024-11-16 19:37:01,414 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60af38aa8/5d9e39aa58644f59acfdded47bb99780/FLAG819a19d07 [2024-11-16 19:37:01,435 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60af38aa8/5d9e39aa58644f59acfdded47bb99780 [2024-11-16 19:37:01,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:37:01,441 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:37:01,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:37:01,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:37:01,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:37:01,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:37:01" (1/1) ... [2024-11-16 19:37:01,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16898062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:01, skipping insertion in model container [2024-11-16 19:37:01,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:37:01" (1/1) ... [2024-11-16 19:37:01,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:37:01,875 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] [2024-11-16 19:37:01,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:37:01,914 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:37:01,992 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] [2024-11-16 19:37:02,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:37:02,060 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:37:02,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02 WrapperNode [2024-11-16 19:37:02,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:37:02,062 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:37:02,062 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:37:02,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:37:02,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,088 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,115 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-11-16 19:37:02,115 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:37:02,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:37:02,116 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:37:02,116 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:37:02,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,130 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,151 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]. [2024-11-16 19:37:02,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,164 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,176 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:37:02,181 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:37:02,181 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:37:02,181 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:37:02,182 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (1/1) ... [2024-11-16 19:37:02,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:37:02,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:37:02,221 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) [2024-11-16 19:37:02,223 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 [2024-11-16 19:37:02,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:37:02,267 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-16 19:37:02,268 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-16 19:37:02,268 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-16 19:37:02,268 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-16 19:37:02,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:37:02,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:37:02,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:37:02,270 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:37:02,403 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:37:02,405 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:37:02,551 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:37:02,551 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:37:02,640 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:37:02,641 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:37:02,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:37:02 BoogieIcfgContainer [2024-11-16 19:37:02,641 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:37:02,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:37:02,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:37:02,649 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:37:02,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:37:01" (1/3) ... [2024-11-16 19:37:02,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe6a991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:37:02, skipping insertion in model container [2024-11-16 19:37:02,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:37:02" (2/3) ... [2024-11-16 19:37:02,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe6a991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:37:02, skipping insertion in model container [2024-11-16 19:37:02,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:37:02" (3/3) ... [2024-11-16 19:37:02,653 INFO L112 eAbstractionObserver]: Analyzing ICFG unwind3-100.i [2024-11-16 19:37:02,669 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:37:02,669 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:37:02,669 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:37:02,723 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:37:02,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 64 flow [2024-11-16 19:37:02,811 INFO L124 PetriNetUnfolderBase]: 8/45 cut-off events. [2024-11-16 19:37:02,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:37:02,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 8/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2024-11-16 19:37:02,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 64 flow [2024-11-16 19:37:02,817 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 55 flow [2024-11-16 19:37:02,832 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:37:02,841 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;@64662044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:37:02,842 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:37:02,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:37:02,857 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-16 19:37:02,857 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:37:02,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:02,858 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:02,859 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:37:02,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1593328314, now seen corresponding path program 1 times [2024-11-16 19:37:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:02,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296839370] [2024-11-16 19:37:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:02,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:03,027 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:37:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:03,079 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:37:03,081 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:37:03,082 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-16 19:37:03,085 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2024-11-16 19:37:03,085 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-16 19:37:03,086 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-16 19:37:03,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:37:03,087 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:37:03,091 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:37:03,093 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:37:03,131 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:37:03,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 108 flow [2024-11-16 19:37:03,159 INFO L124 PetriNetUnfolderBase]: 12/68 cut-off events. [2024-11-16 19:37:03,160 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:37:03,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 68 events. 12/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2024-11-16 19:37:03,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 108 flow [2024-11-16 19:37:03,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 28 transitions, 69 flow [2024-11-16 19:37:03,166 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:37:03,167 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;@64662044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:37:03,168 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-16 19:37:03,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:37:03,182 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-16 19:37:03,182 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:37:03,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:03,183 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:03,183 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-16 19:37:03,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1361706274, now seen corresponding path program 1 times [2024-11-16 19:37:03,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:03,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547321249] [2024-11-16 19:37:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:03,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:03,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547321249] [2024-11-16 19:37:03,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547321249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:03,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:03,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:37:03,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907608289] [2024-11-16 19:37:03,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:03,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:37:03,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:03,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:37:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:37:03,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-16 19:37:03,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 69 flow. Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 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) [2024-11-16 19:37:03,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:03,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-16 19:37:03,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:03,528 INFO L124 PetriNetUnfolderBase]: 414/733 cut-off events. [2024-11-16 19:37:03,529 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-16 19:37:03,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 733 events. 414/733 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3146 event pairs, 372 based on Foata normal form. 63/765 useless extension candidates. Maximal degree in co-relation 387. Up to 667 conditions per place. [2024-11-16 19:37:03,542 INFO L140 encePairwiseOnDemand]: 42/44 looper letters, 19 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2024-11-16 19:37:03,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 103 flow [2024-11-16 19:37:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:37:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:37:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 47 transitions. [2024-11-16 19:37:03,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-11-16 19:37:03,557 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 69 flow. Second operand 2 states and 47 transitions. [2024-11-16 19:37:03,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 103 flow [2024-11-16 19:37:03,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:37:03,562 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 64 flow [2024-11-16 19:37:03,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-11-16 19:37:03,568 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2024-11-16 19:37:03,569 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 64 flow [2024-11-16 19:37:03,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 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) [2024-11-16 19:37:03,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:03,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:03,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:37:03,570 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-16 19:37:03,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1407320651, now seen corresponding path program 1 times [2024-11-16 19:37:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:03,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038387066] [2024-11-16 19:37:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:03,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:03,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038387066] [2024-11-16 19:37:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038387066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:03,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:03,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:37:03,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240486264] [2024-11-16 19:37:03,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:03,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:37:03,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:37:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:37:03,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-16 19:37:03,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-16 19:37:03,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:03,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-16 19:37:03,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:03,920 INFO L124 PetriNetUnfolderBase]: 436/785 cut-off events. [2024-11-16 19:37:03,921 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-16 19:37:03,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 785 events. 436/785 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3345 event pairs, 204 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 1539. Up to 694 conditions per place. [2024-11-16 19:37:03,934 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-11-16 19:37:03,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 126 flow [2024-11-16 19:37:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:37:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:37:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-11-16 19:37:03,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-11-16 19:37:03,938 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 64 flow. Second operand 4 states and 71 transitions. [2024-11-16 19:37:03,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 126 flow [2024-11-16 19:37:03,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:37:03,943 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 78 flow [2024-11-16 19:37:03,943 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=33, 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=78, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-11-16 19:37:03,944 INFO L277 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-11-16 19:37:03,944 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 78 flow [2024-11-16 19:37:03,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-16 19:37:03,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:03,944 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:03,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:37:03,945 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-16 19:37:03,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1591765757, now seen corresponding path program 1 times [2024-11-16 19:37:03,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058942509] [2024-11-16 19:37:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:03,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:37:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:03,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:37:03,980 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:37:03,981 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-16 19:37:03,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2024-11-16 19:37:03,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-16 19:37:03,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-16 19:37:03,981 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-16 19:37:03,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:37:03,982 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:37:03,983 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:37:03,983 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:37:04,015 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:37:04,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 156 flow [2024-11-16 19:37:04,024 INFO L124 PetriNetUnfolderBase]: 16/91 cut-off events. [2024-11-16 19:37:04,025 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-16 19:37:04,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 91 events. 16/91 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 228 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 108. Up to 8 conditions per place. [2024-11-16 19:37:04,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 156 flow [2024-11-16 19:37:04,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 32 transitions, 85 flow [2024-11-16 19:37:04,027 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:37:04,028 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;@64662044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:37:04,028 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-16 19:37:04,031 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:37:04,032 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-16 19:37:04,032 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:37:04,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:04,032 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:04,032 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:37:04,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash -650245948, now seen corresponding path program 1 times [2024-11-16 19:37:04,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:04,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992855183] [2024-11-16 19:37:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:04,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:04,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992855183] [2024-11-16 19:37:04,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992855183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:04,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:04,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:37:04,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238797392] [2024-11-16 19:37:04,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:04,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:37:04,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:04,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:37:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:37:04,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 60 [2024-11-16 19:37:04,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 85 flow. Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 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) [2024-11-16 19:37:04,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:04,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 60 [2024-11-16 19:37:04,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:04,377 INFO L124 PetriNetUnfolderBase]: 2414/3653 cut-off events. [2024-11-16 19:37:04,377 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-11-16 19:37:04,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7341 conditions, 3653 events. 2414/3653 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17880 event pairs, 2244 based on Foata normal form. 255/3841 useless extension candidates. Maximal degree in co-relation 2061. Up to 3435 conditions per place. [2024-11-16 19:37:04,401 INFO L140 encePairwiseOnDemand]: 58/60 looper letters, 23 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2024-11-16 19:37:04,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 127 flow [2024-11-16 19:37:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:37:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:37:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 59 transitions. [2024-11-16 19:37:04,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-11-16 19:37:04,404 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 85 flow. Second operand 2 states and 59 transitions. [2024-11-16 19:37:04,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 127 flow [2024-11-16 19:37:04,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-16 19:37:04,408 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 78 flow [2024-11-16 19:37:04,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2024-11-16 19:37:04,409 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-11-16 19:37:04,410 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 78 flow [2024-11-16 19:37:04,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 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) [2024-11-16 19:37:04,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:04,411 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:04,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:37:04,411 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:37:04,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1563443126, now seen corresponding path program 1 times [2024-11-16 19:37:04,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:04,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296556726] [2024-11-16 19:37:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:04,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:04,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:04,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296556726] [2024-11-16 19:37:04,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296556726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:04,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:04,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:37:04,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397510410] [2024-11-16 19:37:04,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:04,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:37:04,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:37:04,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:37:04,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2024-11-16 19:37:04,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-11-16 19:37:04,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:04,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2024-11-16 19:37:04,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:04,855 INFO L124 PetriNetUnfolderBase]: 2580/3969 cut-off events. [2024-11-16 19:37:04,856 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-16 19:37:04,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 3969 events. 2580/3969 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 19728 event pairs, 1596 based on Foata normal form. 0/3829 useless extension candidates. Maximal degree in co-relation 7875. Up to 3670 conditions per place. [2024-11-16 19:37:04,920 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 27 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-11-16 19:37:04,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 148 flow [2024-11-16 19:37:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:37:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:37:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-16 19:37:04,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37916666666666665 [2024-11-16 19:37:04,923 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 78 flow. Second operand 4 states and 91 transitions. [2024-11-16 19:37:04,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 148 flow [2024-11-16 19:37:04,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:37:04,926 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 92 flow [2024-11-16 19:37:04,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=92, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2024-11-16 19:37:04,927 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2024-11-16 19:37:04,927 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 92 flow [2024-11-16 19:37:04,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2024-11-16 19:37:04,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:04,928 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:04,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:37:04,928 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:37:04,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash 14865922, now seen corresponding path program 1 times [2024-11-16 19:37:04,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:04,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656362239] [2024-11-16 19:37:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:04,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:05,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:05,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656362239] [2024-11-16 19:37:05,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656362239] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:05,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:05,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:37:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132824926] [2024-11-16 19:37:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:05,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:37:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:05,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:37:05,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:37:05,068 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 60 [2024-11-16 19:37:05,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2024-11-16 19:37:05,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:05,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 60 [2024-11-16 19:37:05,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:05,579 INFO L124 PetriNetUnfolderBase]: 3261/5308 cut-off events. [2024-11-16 19:37:05,579 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-11-16 19:37:05,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10269 conditions, 5308 events. 3261/5308 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 30469 event pairs, 2241 based on Foata normal form. 168/5407 useless extension candidates. Maximal degree in co-relation 10261. Up to 3420 conditions per place. [2024-11-16 19:37:05,618 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 32 selfloop transitions, 3 changer transitions 11/53 dead transitions. [2024-11-16 19:37:05,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 228 flow [2024-11-16 19:37:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:37:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:37:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-16 19:37:05,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-11-16 19:37:05,623 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 92 flow. Second operand 5 states and 126 transitions. [2024-11-16 19:37:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 228 flow [2024-11-16 19:37:05,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:37:05,627 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 104 flow [2024-11-16 19:37:05,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=104, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2024-11-16 19:37:05,629 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2024-11-16 19:37:05,629 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 104 flow [2024-11-16 19:37:05,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2024-11-16 19:37:05,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:05,633 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:05,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:37:05,634 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-16 19:37:05,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1777511331, now seen corresponding path program 1 times [2024-11-16 19:37:05,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:05,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777438168] [2024-11-16 19:37:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:05,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:05,654 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:37:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:05,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:37:05,675 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:37:05,676 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-16 19:37:05,677 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-16 19:37:05,677 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-16 19:37:05,677 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-16 19:37:05,677 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-16 19:37:05,677 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-16 19:37:05,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:37:05,678 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-16 19:37:05,681 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:37:05,681 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:37:05,722 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:37:05,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 76 transitions, 208 flow [2024-11-16 19:37:05,734 INFO L124 PetriNetUnfolderBase]: 20/114 cut-off events. [2024-11-16 19:37:05,735 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-16 19:37:05,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 114 events. 20/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 310 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 138. Up to 10 conditions per place. [2024-11-16 19:37:05,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 76 transitions, 208 flow [2024-11-16 19:37:05,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 36 transitions, 103 flow [2024-11-16 19:37:05,737 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:37:05,739 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;@64662044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:37:05,739 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-16 19:37:05,751 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:37:05,751 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-16 19:37:05,751 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:37:05,752 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:05,752 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:05,752 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:37:05,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:05,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1025763473, now seen corresponding path program 1 times [2024-11-16 19:37:05,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:05,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401894214] [2024-11-16 19:37:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:05,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:05,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:05,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401894214] [2024-11-16 19:37:05,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401894214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:05,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:05,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:37:05,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341292925] [2024-11-16 19:37:05,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:05,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:37:05,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:37:05,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:37:05,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 76 [2024-11-16 19:37:05,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 103 flow. Second operand has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 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) [2024-11-16 19:37:05,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:05,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 76 [2024-11-16 19:37:05,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:07,178 INFO L124 PetriNetUnfolderBase]: 12718/17415 cut-off events. [2024-11-16 19:37:07,178 INFO L125 PetriNetUnfolderBase]: For 1309/1309 co-relation queries the response was YES. [2024-11-16 19:37:07,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35312 conditions, 17415 events. 12718/17415 cut-off events. For 1309/1309 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 90470 event pairs, 12036 based on Foata normal form. 1023/18007 useless extension candidates. Maximal degree in co-relation 10365. Up to 16811 conditions per place. [2024-11-16 19:37:07,313 INFO L140 encePairwiseOnDemand]: 74/76 looper letters, 27 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2024-11-16 19:37:07,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 153 flow [2024-11-16 19:37:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:37:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:37:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2024-11-16 19:37:07,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46710526315789475 [2024-11-16 19:37:07,315 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 103 flow. Second operand 2 states and 71 transitions. [2024-11-16 19:37:07,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 153 flow [2024-11-16 19:37:07,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 34 transitions, 146 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-16 19:37:07,335 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 92 flow [2024-11-16 19:37:07,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-11-16 19:37:07,336 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-11-16 19:37:07,336 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 92 flow [2024-11-16 19:37:07,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 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) [2024-11-16 19:37:07,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:07,337 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:07,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-16 19:37:07,337 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:37:07,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1983509777, now seen corresponding path program 1 times [2024-11-16 19:37:07,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:07,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527675748] [2024-11-16 19:37:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:07,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:07,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:07,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527675748] [2024-11-16 19:37:07,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527675748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:07,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:07,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:37:07,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229772532] [2024-11-16 19:37:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:07,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:37:07,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:37:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:37:07,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 76 [2024-11-16 19:37:07,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-16 19:37:07,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:07,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 76 [2024-11-16 19:37:07,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:08,823 INFO L124 PetriNetUnfolderBase]: 13652/18677 cut-off events. [2024-11-16 19:37:08,823 INFO L125 PetriNetUnfolderBase]: For 588/588 co-relation queries the response was YES. [2024-11-16 19:37:08,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37694 conditions, 18677 events. 13652/18677 cut-off events. For 588/588 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 96024 event pairs, 9660 based on Foata normal form. 0/17977 useless extension candidates. Maximal degree in co-relation 37687. Up to 18070 conditions per place. [2024-11-16 19:37:08,967 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 31 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-11-16 19:37:08,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 170 flow [2024-11-16 19:37:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:37:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:37:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-11-16 19:37:08,969 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3651315789473684 [2024-11-16 19:37:08,969 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 92 flow. Second operand 4 states and 111 transitions. [2024-11-16 19:37:08,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 170 flow [2024-11-16 19:37:08,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:37:08,973 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 106 flow [2024-11-16 19:37:08,973 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=106, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2024-11-16 19:37:08,973 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2024-11-16 19:37:08,974 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 106 flow [2024-11-16 19:37:08,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-16 19:37:08,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:08,974 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:08,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 19:37:08,975 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:37:08,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash 710591375, now seen corresponding path program 1 times [2024-11-16 19:37:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:08,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290398543] [2024-11-16 19:37:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:08,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:09,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290398543] [2024-11-16 19:37:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290398543] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:09,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:09,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:37:09,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850007080] [2024-11-16 19:37:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:09,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:37:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:37:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:37:09,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 76 [2024-11-16 19:37:09,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2024-11-16 19:37:09,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:09,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 76 [2024-11-16 19:37:09,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:10,817 INFO L124 PetriNetUnfolderBase]: 17149/24676 cut-off events. [2024-11-16 19:37:10,817 INFO L125 PetriNetUnfolderBase]: For 850/850 co-relation queries the response was YES. [2024-11-16 19:37:11,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48642 conditions, 24676 events. 17149/24676 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 148736 event pairs, 12033 based on Foata normal form. 680/24907 useless extension candidates. Maximal degree in co-relation 48633. Up to 16796 conditions per place. [2024-11-16 19:37:11,135 INFO L140 encePairwiseOnDemand]: 71/76 looper letters, 39 selfloop transitions, 3 changer transitions 14/63 dead transitions. [2024-11-16 19:37:11,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 274 flow [2024-11-16 19:37:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:37:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:37:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-11-16 19:37:11,137 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2024-11-16 19:37:11,137 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 106 flow. Second operand 5 states and 156 transitions. [2024-11-16 19:37:11,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 274 flow [2024-11-16 19:37:11,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:37:11,141 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 118 flow [2024-11-16 19:37:11,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=118, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2024-11-16 19:37:11,143 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-11-16 19:37:11,143 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 118 flow [2024-11-16 19:37:11,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2024-11-16 19:37:11,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:11,144 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:11,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-16 19:37:11,144 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:37:11,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:11,145 INFO L85 PathProgramCache]: Analyzing trace with hash 3336044, now seen corresponding path program 1 times [2024-11-16 19:37:11,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:11,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327560961] [2024-11-16 19:37:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:11,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:11,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:11,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327560961] [2024-11-16 19:37:11,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327560961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:37:11,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111959101] [2024-11-16 19:37:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:11,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:37:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:37:11,220 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) [2024-11-16 19:37:11,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:37:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:11,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:37:11,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:37:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:11,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:37:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:11,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111959101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:37:11,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:37:11,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-16 19:37:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976945062] [2024-11-16 19:37:11,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:37:11,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 19:37:11,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:11,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 19:37:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-16 19:37:11,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 76 [2024-11-16 19:37:11,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 36 transitions, 118 flow. Second operand has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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) [2024-11-16 19:37:11,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:11,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 76 [2024-11-16 19:37:11,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:12,722 INFO L124 PetriNetUnfolderBase]: 13314/19415 cut-off events. [2024-11-16 19:37:12,723 INFO L125 PetriNetUnfolderBase]: For 4263/4263 co-relation queries the response was YES. [2024-11-16 19:37:12,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41272 conditions, 19415 events. 13314/19415 cut-off events. For 4263/4263 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 110071 event pairs, 1216 based on Foata normal form. 84/18731 useless extension candidates. Maximal degree in co-relation 41261. Up to 14850 conditions per place. [2024-11-16 19:37:12,851 INFO L140 encePairwiseOnDemand]: 71/76 looper letters, 60 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-16 19:37:12,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 72 transitions, 328 flow [2024-11-16 19:37:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:37:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:37:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-11-16 19:37:12,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37969924812030076 [2024-11-16 19:37:12,854 INFO L175 Difference]: Start difference. First operand has 53 places, 36 transitions, 118 flow. Second operand 7 states and 202 transitions. [2024-11-16 19:37:12,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 72 transitions, 328 flow [2024-11-16 19:37:12,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 322 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-16 19:37:12,965 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 155 flow [2024-11-16 19:37:12,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, 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=155, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2024-11-16 19:37:12,966 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-11-16 19:37:12,966 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 155 flow [2024-11-16 19:37:12,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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) [2024-11-16 19:37:12,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:12,967 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:12,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:37:13,171 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,SelfDestructingSolverStorable11 [2024-11-16 19:37:13,172 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-16 19:37:13,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1688599898, now seen corresponding path program 1 times [2024-11-16 19:37:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935617285] [2024-11-16 19:37:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:13,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:13,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:37:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:13,210 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:37:13,210 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:37:13,211 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-16 19:37:13,211 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2024-11-16 19:37:13,211 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-16 19:37:13,211 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-16 19:37:13,212 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-16 19:37:13,212 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-16 19:37:13,212 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-16 19:37:13,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-16 19:37:13,212 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-16 19:37:13,215 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:37:13,216 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-16 19:37:13,263 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:37:13,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 92 transitions, 264 flow [2024-11-16 19:37:13,280 INFO L124 PetriNetUnfolderBase]: 24/137 cut-off events. [2024-11-16 19:37:13,280 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-16 19:37:13,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 137 events. 24/137 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 393 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 169. Up to 12 conditions per place. [2024-11-16 19:37:13,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 92 transitions, 264 flow [2024-11-16 19:37:13,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 40 transitions, 123 flow [2024-11-16 19:37:13,283 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:37:13,284 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;@64662044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:37:13,284 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-16 19:37:13,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:37:13,288 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-16 19:37:13,288 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:37:13,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:13,288 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:13,289 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-16 19:37:13,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1785713737, now seen corresponding path program 1 times [2024-11-16 19:37:13,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:13,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718097625] [2024-11-16 19:37:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:13,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:13,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:13,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718097625] [2024-11-16 19:37:13,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718097625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:13,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:37:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107931496] [2024-11-16 19:37:13,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:13,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:37:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:37:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:37:13,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 92 [2024-11-16 19:37:13,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 123 flow. Second operand has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 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) [2024-11-16 19:37:13,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:13,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 92 [2024-11-16 19:37:13,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:18,478 INFO L124 PetriNetUnfolderBase]: 63150/82549 cut-off events. [2024-11-16 19:37:18,478 INFO L125 PetriNetUnfolderBase]: For 7773/7773 co-relation queries the response was YES. [2024-11-16 19:37:18,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166751 conditions, 82549 events. 63150/82549 cut-off events. For 7773/7773 co-relation queries the response was YES. Maximal size of possible extension queue 2185. Compared 460199 event pairs, 60420 based on Foata normal form. 4095/85617 useless extension candidates. Maximal degree in co-relation 49981. Up to 79531 conditions per place. [2024-11-16 19:37:18,975 INFO L140 encePairwiseOnDemand]: 90/92 looper letters, 31 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2024-11-16 19:37:18,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 181 flow [2024-11-16 19:37:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:37:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:37:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 83 transitions. [2024-11-16 19:37:18,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45108695652173914 [2024-11-16 19:37:18,977 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 123 flow. Second operand 2 states and 83 transitions. [2024-11-16 19:37:18,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 181 flow [2024-11-16 19:37:19,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 168 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-16 19:37:19,077 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 106 flow [2024-11-16 19:37:19,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=106, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2024-11-16 19:37:19,077 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-11-16 19:37:19,077 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 106 flow [2024-11-16 19:37:19,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 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) [2024-11-16 19:37:19,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:19,078 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:19,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-16 19:37:19,078 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-16 19:37:19,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2016684572, now seen corresponding path program 1 times [2024-11-16 19:37:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:19,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071782114] [2024-11-16 19:37:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:19,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:19,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071782114] [2024-11-16 19:37:19,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071782114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:19,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:19,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:37:19,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646893996] [2024-11-16 19:37:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:19,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:37:19,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:37:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:37:19,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 92 [2024-11-16 19:37:19,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2024-11-16 19:37:19,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:19,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 92 [2024-11-16 19:37:19,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:24,468 INFO L124 PetriNetUnfolderBase]: 67924/88429 cut-off events. [2024-11-16 19:37:24,468 INFO L125 PetriNetUnfolderBase]: For 3404/3404 co-relation queries the response was YES. [2024-11-16 19:37:24,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177847 conditions, 88429 events. 67924/88429 cut-off events. For 3404/3404 co-relation queries the response was YES. Maximal size of possible extension queue 2029. Compared 484771 event pairs, 51900 based on Foata normal form. 0/86369 useless extension candidates. Maximal degree in co-relation 177839. Up to 85654 conditions per place. [2024-11-16 19:37:24,999 INFO L140 encePairwiseOnDemand]: 88/92 looper letters, 35 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-11-16 19:37:24,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 192 flow [2024-11-16 19:37:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:37:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:37:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-11-16 19:37:25,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35597826086956524 [2024-11-16 19:37:25,000 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 106 flow. Second operand 4 states and 131 transitions. [2024-11-16 19:37:25,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 192 flow [2024-11-16 19:37:25,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 43 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:37:25,012 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 120 flow [2024-11-16 19:37:25,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=120, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2024-11-16 19:37:25,013 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-11-16 19:37:25,013 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 120 flow [2024-11-16 19:37:25,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2024-11-16 19:37:25,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:25,014 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:25,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-16 19:37:25,014 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-16 19:37:25,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash 470953164, now seen corresponding path program 1 times [2024-11-16 19:37:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816139484] [2024-11-16 19:37:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:25,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:25,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:25,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816139484] [2024-11-16 19:37:25,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816139484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:25,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:25,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:37:25,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735995567] [2024-11-16 19:37:25,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:25,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:37:25,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:37:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:37:25,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 92 [2024-11-16 19:37:25,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 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) [2024-11-16 19:37:25,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:25,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 92 [2024-11-16 19:37:25,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:32,845 INFO L124 PetriNetUnfolderBase]: 84989/115436 cut-off events. [2024-11-16 19:37:32,845 INFO L125 PetriNetUnfolderBase]: For 4426/4426 co-relation queries the response was YES. [2024-11-16 19:37:33,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227727 conditions, 115436 events. 84989/115436 cut-off events. For 4426/4426 co-relation queries the response was YES. Maximal size of possible extension queue 2784. Compared 735066 event pairs, 60417 based on Foata normal form. 2728/117135 useless extension candidates. Maximal degree in co-relation 227717. Up to 79516 conditions per place. [2024-11-16 19:37:33,497 INFO L140 encePairwiseOnDemand]: 87/92 looper letters, 46 selfloop transitions, 3 changer transitions 17/73 dead transitions. [2024-11-16 19:37:33,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 73 transitions, 320 flow [2024-11-16 19:37:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:37:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:37:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-11-16 19:37:33,499 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4043478260869565 [2024-11-16 19:37:33,499 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 120 flow. Second operand 5 states and 186 transitions. [2024-11-16 19:37:33,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 73 transitions, 320 flow [2024-11-16 19:37:33,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:37:33,512 INFO L231 Difference]: Finished difference. Result has 59 places, 40 transitions, 132 flow [2024-11-16 19:37:33,512 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=132, PETRI_PLACES=59, PETRI_TRANSITIONS=40} [2024-11-16 19:37:33,513 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2024-11-16 19:37:33,513 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 40 transitions, 132 flow [2024-11-16 19:37:33,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 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) [2024-11-16 19:37:33,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:33,514 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:33,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-16 19:37:33,514 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-16 19:37:33,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1639251593, now seen corresponding path program 1 times [2024-11-16 19:37:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:33,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076139674] [2024-11-16 19:37:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:33,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:33,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:33,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076139674] [2024-11-16 19:37:33,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076139674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:37:33,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821932637] [2024-11-16 19:37:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:33,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:37:33,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:37:33,565 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) [2024-11-16 19:37:33,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:37:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:33,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:37:33,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:37:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:33,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:37:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:37:33,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821932637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:37:33,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:37:33,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-16 19:37:33,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230763168] [2024-11-16 19:37:33,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:37:33,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 19:37:33,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 19:37:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-16 19:37:33,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 92 [2024-11-16 19:37:33,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 40 transitions, 132 flow. Second operand has 10 states, 10 states have (on average 25.5) internal successors, (255), 10 states have internal predecessors, (255), 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) [2024-11-16 19:37:33,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:33,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 92 [2024-11-16 19:37:33,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:37:39,370 INFO L124 PetriNetUnfolderBase]: 76290/105047 cut-off events. [2024-11-16 19:37:39,371 INFO L125 PetriNetUnfolderBase]: For 19623/19623 co-relation queries the response was YES. [2024-11-16 19:37:39,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222393 conditions, 105047 events. 76290/105047 cut-off events. For 19623/19623 co-relation queries the response was YES. Maximal size of possible extension queue 2316. Compared 666309 event pairs, 7616 based on Foata normal form. 84/101291 useless extension candidates. Maximal degree in co-relation 222381. Up to 84226 conditions per place. [2024-11-16 19:37:40,058 INFO L140 encePairwiseOnDemand]: 87/92 looper letters, 67 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2024-11-16 19:37:40,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 362 flow [2024-11-16 19:37:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:37:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:37:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-11-16 19:37:40,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36801242236024845 [2024-11-16 19:37:40,060 INFO L175 Difference]: Start difference. First operand has 59 places, 40 transitions, 132 flow. Second operand 7 states and 237 transitions. [2024-11-16 19:37:40,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 362 flow [2024-11-16 19:37:42,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 356 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-16 19:37:42,245 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 169 flow [2024-11-16 19:37:42,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=169, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2024-11-16 19:37:42,246 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2024-11-16 19:37:42,246 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 169 flow [2024-11-16 19:37:42,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.5) internal successors, (255), 10 states have internal predecessors, (255), 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) [2024-11-16 19:37:42,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:42,246 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:42,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 19:37:42,447 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,SelfDestructingSolverStorable16 [2024-11-16 19:37:42,447 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-16 19:37:42,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1564189812, now seen corresponding path program 1 times [2024-11-16 19:37:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:42,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607754535] [2024-11-16 19:37:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:42,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:42,467 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:37:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:37:42,481 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:37:42,481 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:37:42,481 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-11-16 19:37:42,482 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 8 remaining) [2024-11-16 19:37:42,482 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-11-16 19:37:42,482 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-11-16 19:37:42,482 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-11-16 19:37:42,482 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-11-16 19:37:42,482 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-11-16 19:37:42,483 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-11-16 19:37:42,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-16 19:37:42,483 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-16 19:37:42,484 WARN L244 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:37:42,484 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-11-16 19:37:42,523 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:37:42,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 108 transitions, 324 flow [2024-11-16 19:37:42,535 INFO L124 PetriNetUnfolderBase]: 28/160 cut-off events. [2024-11-16 19:37:42,536 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-16 19:37:42,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 160 events. 28/160 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 454 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 201. Up to 14 conditions per place. [2024-11-16 19:37:42,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 108 transitions, 324 flow [2024-11-16 19:37:42,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 145 flow [2024-11-16 19:37:42,538 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:37:42,538 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;@64662044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:37:42,539 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-16 19:37:42,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:37:42,541 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-11-16 19:37:42,541 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:37:42,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:37:42,541 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:37:42,541 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2024-11-16 19:37:42,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:37:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash -763759490, now seen corresponding path program 1 times [2024-11-16 19:37:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:37:42,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096391712] [2024-11-16 19:37:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:37:42,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:37:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:37:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:37:42,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:37:42,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096391712] [2024-11-16 19:37:42,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096391712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:37:42,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:37:42,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:37:42,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580402097] [2024-11-16 19:37:42,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:37:42,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:37:42,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:37:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:37:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:37:42,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 108 [2024-11-16 19:37:42,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 145 flow. Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 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) [2024-11-16 19:37:42,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:37:42,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 108 [2024-11-16 19:37:42,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand