./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:28:11,547 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:28:11,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:28:11,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:28:11,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:28:11,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:28:11,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:28:11,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:28:11,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:28:11,628 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:28:11,628 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:28:11,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:28:11,629 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:28:11,629 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:28:11,629 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:28:11,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:28:11,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:28:11,633 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:28:11,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:28:11,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:28:11,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:28:11,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:28:11,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:28:11,635 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:28:11,635 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:28:11,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:28:11,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:28:11,636 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:28:11,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:28:11,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:28:11,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:28:11,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:28:11,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:28:11,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:28:11,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:28:11,638 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:28:11,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:28:11,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:28:11,638 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:28:11,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:28:11,639 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:28:11,639 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:28:11,639 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-10-11 14:28:11,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:28:11,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:28:11,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:28:11,826 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:28:11,827 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:28:11,828 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2024-10-11 14:28:13,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:28:13,163 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:28:13,163 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2024-10-11 14:28:13,169 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/203bc22c7/2daacea403df4f00a23e026ec6e92966/FLAGad056ea2c [2024-10-11 14:28:13,561 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/203bc22c7/2daacea403df4f00a23e026ec6e92966 [2024-10-11 14:28:13,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:28:13,564 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:28:13,565 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:28:13,565 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:28:13,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:28:13,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3338cfc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13, skipping insertion in model container [2024-10-11 14:28:13,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,588 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:28:13,731 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-10-11 14:28:13,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:28:13,745 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:28:13,763 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-10-11 14:28:13,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:28:13,778 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:28:13,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13 WrapperNode [2024-10-11 14:28:13,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:28:13,779 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:28:13,780 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:28:13,780 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:28:13,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,788 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,801 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-10-11 14:28:13,801 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:28:13,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:28:13,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:28:13,801 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:28:13,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,810 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,819 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]. [2024-10-11 14:28:13,819 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,819 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,822 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,826 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:28:13,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:28:13,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:28:13,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:28:13,831 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (1/1) ... [2024-10-11 14:28:13,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:28:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:13,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:28:13,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:28:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:28:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:28:13,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:28:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:28:13,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:28:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:28:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:28:13,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:28:13,908 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:28:13,981 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:28:13,982 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:28:14,123 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:28:14,123 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:28:14,267 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:28:14,267 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:28:14,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:14 BoogieIcfgContainer [2024-10-11 14:28:14,268 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:28:14,270 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:28:14,270 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:28:14,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:28:14,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:13" (1/3) ... [2024-10-11 14:28:14,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5eb57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:14, skipping insertion in model container [2024-10-11 14:28:14,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:13" (2/3) ... [2024-10-11 14:28:14,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5eb57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:14, skipping insertion in model container [2024-10-11 14:28:14,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:14" (3/3) ... [2024-10-11 14:28:14,276 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-10-11 14:28:14,288 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:28:14,288 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:28:14,288 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:28:14,315 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:28:14,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-11 14:28:14,358 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-11 14:28:14,358 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:28:14,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-10-11 14:28:14,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-11 14:28:14,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-11 14:28:14,372 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:28:14,377 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;@2c7f09e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:28:14,377 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:28:14,387 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:28:14,387 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-11 14:28:14,387 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:28:14,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:14,388 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:14,388 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:14,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash 871523174, now seen corresponding path program 1 times [2024-10-11 14:28:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:14,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609455784] [2024-10-11 14:28:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:14,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:14,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609455784] [2024-10-11 14:28:14,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609455784] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:14,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:14,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:28:14,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642081894] [2024-10-11 14:28:14,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:14,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:28:14,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:14,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:28:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:28:14,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:14,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-11 14:28:14,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:14,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:14,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:14,889 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2024-10-11 14:28:14,889 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-11 14:28:14,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 522 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2024-10-11 14:28:14,892 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-10-11 14:28:14,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2024-10-11 14:28:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:28:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:28:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-11 14:28:14,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-10-11 14:28:14,903 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2024-10-11 14:28:14,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2024-10-11 14:28:14,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:28:14,907 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-10-11 14:28:14,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-10-11 14:28:14,911 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-10-11 14:28:14,912 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-10-11 14:28:14,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-11 14:28:14,912 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:14,912 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:14,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:28:14,912 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:14,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1246336607, now seen corresponding path program 1 times [2024-10-11 14:28:14,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:14,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865229140] [2024-10-11 14:28:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:14,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:15,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:15,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865229140] [2024-10-11 14:28:15,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865229140] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:15,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:15,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:28:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991952542] [2024-10-11 14:28:15,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:15,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:28:15,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:15,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:28:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:28:15,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:15,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-11 14:28:15,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:15,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:15,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:15,115 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2024-10-11 14:28:15,115 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2024-10-11 14:28:15,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 815 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2024-10-11 14:28:15,118 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2024-10-11 14:28:15,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2024-10-11 14:28:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:28:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:28:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-10-11 14:28:15,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-10-11 14:28:15,121 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2024-10-11 14:28:15,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2024-10-11 14:28:15,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:28:15,123 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2024-10-11 14:28:15,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-10-11 14:28:15,124 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-10-11 14:28:15,124 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2024-10-11 14:28:15,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-11 14:28:15,124 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:15,125 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:15,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:28:15,125 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:15,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:15,125 INFO L85 PathProgramCache]: Analyzing trace with hash -461020965, now seen corresponding path program 2 times [2024-10-11 14:28:15,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:15,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261434579] [2024-10-11 14:28:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:15,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:15,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:15,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261434579] [2024-10-11 14:28:15,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261434579] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:15,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:15,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:28:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748418296] [2024-10-11 14:28:15,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:15,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:28:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:28:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:28:15,172 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:15,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-11 14:28:15,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:15,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:15,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:15,240 INFO L124 PetriNetUnfolderBase]: 146/238 cut-off events. [2024-10-11 14:28:15,241 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-10-11 14:28:15,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 238 events. 146/238 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 773 event pairs, 14 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2024-10-11 14:28:15,243 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 11 changer transitions 5/50 dead transitions. [2024-10-11 14:28:15,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 299 flow [2024-10-11 14:28:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:28:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:28:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-10-11 14:28:15,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-11 14:28:15,244 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 5 states and 62 transitions. [2024-10-11 14:28:15,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 299 flow [2024-10-11 14:28:15,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 299 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:28:15,247 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 170 flow [2024-10-11 14:28:15,248 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-10-11 14:28:15,249 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2024-10-11 14:28:15,249 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 170 flow [2024-10-11 14:28:15,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-11 14:28:15,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:15,250 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:15,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:28:15,250 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:15,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:15,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1781691219, now seen corresponding path program 1 times [2024-10-11 14:28:15,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:15,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135145101] [2024-10-11 14:28:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:15,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135145101] [2024-10-11 14:28:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135145101] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271762622] [2024-10-11 14:28:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:15,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:15,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:28:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:15,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:28:15,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:15,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:15,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271762622] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:15,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:15,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-11 14:28:15,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889504991] [2024-10-11 14:28:15,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:15,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:28:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:28:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:28:15,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:15,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2024-10-11 14:28:15,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:15,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:15,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:15,578 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2024-10-11 14:28:15,579 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-10-11 14:28:15,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 223 events. 127/223 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 2 based on Foata normal form. 18/239 useless extension candidates. Maximal degree in co-relation 498. Up to 91 conditions per place. [2024-10-11 14:28:15,582 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2024-10-11 14:28:15,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 409 flow [2024-10-11 14:28:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:28:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:28:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-11 14:28:15,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-10-11 14:28:15,584 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 170 flow. Second operand 5 states and 65 transitions. [2024-10-11 14:28:15,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 409 flow [2024-10-11 14:28:15,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 403 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-11 14:28:15,588 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 242 flow [2024-10-11 14:28:15,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-10-11 14:28:15,590 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2024-10-11 14:28:15,590 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 242 flow [2024-10-11 14:28:15,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2024-10-11 14:28:15,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:15,590 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:15,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:28:15,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:15,795 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:15,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash -505918620, now seen corresponding path program 1 times [2024-10-11 14:28:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651689174] [2024-10-11 14:28:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:16,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651689174] [2024-10-11 14:28:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651689174] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554174897] [2024-10-11 14:28:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:16,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:16,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:16,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:16,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:28:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:16,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:28:16,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:16,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:16,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554174897] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:16,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:16,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-11 14:28:16,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395118003] [2024-10-11 14:28:16,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:16,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:28:16,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:28:16,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:28:16,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:16,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 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) [2024-10-11 14:28:16,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:16,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:16,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:16,587 INFO L124 PetriNetUnfolderBase]: 261/447 cut-off events. [2024-10-11 14:28:16,588 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-10-11 14:28:16,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 447 events. 261/447 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1687 event pairs, 10 based on Foata normal form. 2/447 useless extension candidates. Maximal degree in co-relation 1002. Up to 188 conditions per place. [2024-10-11 14:28:16,592 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 74 selfloop transitions, 23 changer transitions 7/107 dead transitions. [2024-10-11 14:28:16,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 107 transitions, 903 flow [2024-10-11 14:28:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:28:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:28:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-10-11 14:28:16,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-10-11 14:28:16,594 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 242 flow. Second operand 9 states and 119 transitions. [2024-10-11 14:28:16,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 107 transitions, 903 flow [2024-10-11 14:28:16,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 107 transitions, 893 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:16,603 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 485 flow [2024-10-11 14:28:16,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2024-10-11 14:28:16,603 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2024-10-11 14:28:16,603 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 485 flow [2024-10-11 14:28:16,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 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) [2024-10-11 14:28:16,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:16,604 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:16,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:28:16,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:16,805 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:16,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:16,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1334491405, now seen corresponding path program 2 times [2024-10-11 14:28:16,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:16,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568223207] [2024-10-11 14:28:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:16,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:16,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:16,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568223207] [2024-10-11 14:28:16,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568223207] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:28:16,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:28:16,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:28:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641648755] [2024-10-11 14:28:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:28:16,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:28:16,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:16,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:28:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:28:16,839 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:16,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-10-11 14:28:16,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:16,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:16,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:16,907 INFO L124 PetriNetUnfolderBase]: 247/423 cut-off events. [2024-10-11 14:28:16,908 INFO L125 PetriNetUnfolderBase]: For 1283/1307 co-relation queries the response was YES. [2024-10-11 14:28:16,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 423 events. 247/423 cut-off events. For 1283/1307 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1538 event pairs, 33 based on Foata normal form. 6/426 useless extension candidates. Maximal degree in co-relation 1826. Up to 185 conditions per place. [2024-10-11 14:28:16,912 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 57 selfloop transitions, 13 changer transitions 5/78 dead transitions. [2024-10-11 14:28:16,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 791 flow [2024-10-11 14:28:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:28:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:28:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-10-11 14:28:16,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-10-11 14:28:16,914 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 485 flow. Second operand 5 states and 59 transitions. [2024-10-11 14:28:16,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 791 flow [2024-10-11 14:28:16,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 742 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-10-11 14:28:16,919 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 518 flow [2024-10-11 14:28:16,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-10-11 14:28:16,920 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2024-10-11 14:28:16,920 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 518 flow [2024-10-11 14:28:16,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-10-11 14:28:16,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:16,920 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:16,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:28:16,920 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:16,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2029300336, now seen corresponding path program 2 times [2024-10-11 14:28:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:16,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152040566] [2024-10-11 14:28:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:16,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:17,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:17,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152040566] [2024-10-11 14:28:17,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152040566] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:17,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764494596] [2024-10-11 14:28:17,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:17,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:17,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:17,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:17,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:28:17,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:17,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:17,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:28:17,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:17,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:17,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764494596] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:17,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:17,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-11 14:28:17,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256317527] [2024-10-11 14:28:17,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:17,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:28:17,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:17,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:28:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:28:17,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:17,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 518 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-10-11 14:28:17,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:17,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:17,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:17,977 INFO L124 PetriNetUnfolderBase]: 729/1242 cut-off events. [2024-10-11 14:28:17,977 INFO L125 PetriNetUnfolderBase]: For 4696/4696 co-relation queries the response was YES. [2024-10-11 14:28:17,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5856 conditions, 1242 events. 729/1242 cut-off events. For 4696/4696 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6016 event pairs, 46 based on Foata normal form. 8/1249 useless extension candidates. Maximal degree in co-relation 5138. Up to 333 conditions per place. [2024-10-11 14:28:17,986 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 146 selfloop transitions, 96 changer transitions 12/257 dead transitions. [2024-10-11 14:28:17,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 257 transitions, 2619 flow [2024-10-11 14:28:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:28:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:28:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 232 transitions. [2024-10-11 14:28:17,987 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6823529411764706 [2024-10-11 14:28:17,987 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 518 flow. Second operand 17 states and 232 transitions. [2024-10-11 14:28:17,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 257 transitions, 2619 flow [2024-10-11 14:28:17,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 257 transitions, 2513 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-10-11 14:28:18,000 INFO L231 Difference]: Finished difference. Result has 82 places, 147 transitions, 1757 flow [2024-10-11 14:28:18,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1757, PETRI_PLACES=82, PETRI_TRANSITIONS=147} [2024-10-11 14:28:18,001 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2024-10-11 14:28:18,001 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 147 transitions, 1757 flow [2024-10-11 14:28:18,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-10-11 14:28:18,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:18,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:18,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:28:18,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:18,206 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:18,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2018971582, now seen corresponding path program 3 times [2024-10-11 14:28:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:18,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448086198] [2024-10-11 14:28:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:18,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:18,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:18,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448086198] [2024-10-11 14:28:18,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448086198] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:18,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974692916] [2024-10-11 14:28:18,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:28:18,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:18,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:18,375 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:18,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:28:18,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:28:18,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:18,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:28:18,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:18,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:18,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974692916] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:18,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:18,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-11 14:28:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503324564] [2024-10-11 14:28:18,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:18,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:28:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:18,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:28:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:28:18,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:18,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 147 transitions, 1757 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-10-11 14:28:18,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:18,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:18,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:19,196 INFO L124 PetriNetUnfolderBase]: 1487/2540 cut-off events. [2024-10-11 14:28:19,197 INFO L125 PetriNetUnfolderBase]: For 13112/13112 co-relation queries the response was YES. [2024-10-11 14:28:19,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13881 conditions, 2540 events. 1487/2540 cut-off events. For 13112/13112 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14300 event pairs, 122 based on Foata normal form. 7/2546 useless extension candidates. Maximal degree in co-relation 12010. Up to 658 conditions per place. [2024-10-11 14:28:19,271 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 189 selfloop transitions, 164 changer transitions 12/368 dead transitions. [2024-10-11 14:28:19,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 368 transitions, 4819 flow [2024-10-11 14:28:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:28:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:28:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-10-11 14:28:19,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6681818181818182 [2024-10-11 14:28:19,273 INFO L175 Difference]: Start difference. First operand has 82 places, 147 transitions, 1757 flow. Second operand 11 states and 147 transitions. [2024-10-11 14:28:19,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 368 transitions, 4819 flow [2024-10-11 14:28:19,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 368 transitions, 4462 flow, removed 175 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:19,302 INFO L231 Difference]: Finished difference. Result has 95 places, 258 transitions, 3563 flow [2024-10-11 14:28:19,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3563, PETRI_PLACES=95, PETRI_TRANSITIONS=258} [2024-10-11 14:28:19,303 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2024-10-11 14:28:19,303 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 258 transitions, 3563 flow [2024-10-11 14:28:19,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-10-11 14:28:19,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:19,303 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:19,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 14:28:19,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 14:28:19,508 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:19,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:19,508 INFO L85 PathProgramCache]: Analyzing trace with hash -90873109, now seen corresponding path program 1 times [2024-10-11 14:28:19,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:19,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971209684] [2024-10-11 14:28:19,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:19,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971209684] [2024-10-11 14:28:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971209684] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86933381] [2024-10-11 14:28:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:19,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:19,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:19,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:19,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:28:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:19,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:28:19,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:19,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:19,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86933381] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:19,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:19,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-10-11 14:28:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743513653] [2024-10-11 14:28:19,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:19,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:28:19,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:28:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:28:19,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:19,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 258 transitions, 3563 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-10-11 14:28:19,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:19,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:19,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:20,310 INFO L124 PetriNetUnfolderBase]: 2297/4006 cut-off events. [2024-10-11 14:28:20,310 INFO L125 PetriNetUnfolderBase]: For 27522/27542 co-relation queries the response was YES. [2024-10-11 14:28:20,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23618 conditions, 4006 events. 2297/4006 cut-off events. For 27522/27542 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25703 event pairs, 37 based on Foata normal form. 57/4061 useless extension candidates. Maximal degree in co-relation 20786. Up to 1209 conditions per place. [2024-10-11 14:28:20,340 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 407 selfloop transitions, 149 changer transitions 2/561 dead transitions. [2024-10-11 14:28:20,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 561 transitions, 8255 flow [2024-10-11 14:28:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:28:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:28:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-10-11 14:28:20,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-10-11 14:28:20,342 INFO L175 Difference]: Start difference. First operand has 95 places, 258 transitions, 3563 flow. Second operand 12 states and 142 transitions. [2024-10-11 14:28:20,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 561 transitions, 8255 flow [2024-10-11 14:28:20,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 561 transitions, 8087 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-10-11 14:28:20,400 INFO L231 Difference]: Finished difference. Result has 107 places, 354 transitions, 5545 flow [2024-10-11 14:28:20,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5545, PETRI_PLACES=107, PETRI_TRANSITIONS=354} [2024-10-11 14:28:20,401 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2024-10-11 14:28:20,401 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 354 transitions, 5545 flow [2024-10-11 14:28:20,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-10-11 14:28:20,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:20,402 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:20,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:28:20,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:20,606 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:20,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash -217573595, now seen corresponding path program 2 times [2024-10-11 14:28:20,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:20,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762605000] [2024-10-11 14:28:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:20,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:20,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:20,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762605000] [2024-10-11 14:28:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762605000] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:20,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126810601] [2024-10-11 14:28:20,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:28:20,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:20,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:20,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:20,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:28:20,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:28:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:20,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:28:20,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:20,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:20,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126810601] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:20,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:20,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-10-11 14:28:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488738516] [2024-10-11 14:28:20,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:20,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:28:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:28:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:28:20,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:20,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 354 transitions, 5545 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-10-11 14:28:20,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:20,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:20,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:21,616 INFO L124 PetriNetUnfolderBase]: 2687/4849 cut-off events. [2024-10-11 14:28:21,617 INFO L125 PetriNetUnfolderBase]: For 42268/42268 co-relation queries the response was YES. [2024-10-11 14:28:21,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31857 conditions, 4849 events. 2687/4849 cut-off events. For 42268/42268 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33577 event pairs, 186 based on Foata normal form. 36/4884 useless extension candidates. Maximal degree in co-relation 31465. Up to 1629 conditions per place. [2024-10-11 14:28:21,651 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 345 selfloop transitions, 300 changer transitions 0/648 dead transitions. [2024-10-11 14:28:21,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 648 transitions, 10824 flow [2024-10-11 14:28:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:28:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:28:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-10-11 14:28:21,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-10-11 14:28:21,653 INFO L175 Difference]: Start difference. First operand has 107 places, 354 transitions, 5545 flow. Second operand 14 states and 162 transitions. [2024-10-11 14:28:21,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 648 transitions, 10824 flow [2024-10-11 14:28:21,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 648 transitions, 10391 flow, removed 209 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:21,771 INFO L231 Difference]: Finished difference. Result has 124 places, 474 transitions, 8098 flow [2024-10-11 14:28:21,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5198, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8098, PETRI_PLACES=124, PETRI_TRANSITIONS=474} [2024-10-11 14:28:21,772 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2024-10-11 14:28:21,772 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 474 transitions, 8098 flow [2024-10-11 14:28:21,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-10-11 14:28:21,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:21,772 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:21,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:28:21,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:28:21,973 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:21,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1366077662, now seen corresponding path program 3 times [2024-10-11 14:28:21,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:21,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751779959] [2024-10-11 14:28:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:22,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:22,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751779959] [2024-10-11 14:28:22,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751779959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:22,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551329242] [2024-10-11 14:28:22,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:28:22,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:22,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:22,226 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:22,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:28:22,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:28:22,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:22,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 14:28:22,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:23,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:28:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551329242] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:23,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:23,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-10-11 14:28:23,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385267015] [2024-10-11 14:28:23,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:23,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:28:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:28:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:28:23,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:23,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 474 transitions, 8098 flow. Second operand has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 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) [2024-10-11 14:28:23,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:23,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:23,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:25,803 INFO L124 PetriNetUnfolderBase]: 4077/7426 cut-off events. [2024-10-11 14:28:25,803 INFO L125 PetriNetUnfolderBase]: For 80964/80964 co-relation queries the response was YES. [2024-10-11 14:28:25,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51983 conditions, 7426 events. 4077/7426 cut-off events. For 80964/80964 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 53763 event pairs, 322 based on Foata normal form. 37/7462 useless extension candidates. Maximal degree in co-relation 51256. Up to 4470 conditions per place. [2024-10-11 14:28:25,851 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 624 selfloop transitions, 283 changer transitions 25/935 dead transitions. [2024-10-11 14:28:25,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 935 transitions, 17152 flow [2024-10-11 14:28:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:28:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:28:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 245 transitions. [2024-10-11 14:28:25,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6447368421052632 [2024-10-11 14:28:25,852 INFO L175 Difference]: Start difference. First operand has 124 places, 474 transitions, 8098 flow. Second operand 19 states and 245 transitions. [2024-10-11 14:28:25,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 935 transitions, 17152 flow [2024-10-11 14:28:26,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 935 transitions, 16802 flow, removed 169 selfloop flow, removed 2 redundant places. [2024-10-11 14:28:26,189 INFO L231 Difference]: Finished difference. Result has 150 places, 689 transitions, 12899 flow [2024-10-11 14:28:26,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7912, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12899, PETRI_PLACES=150, PETRI_TRANSITIONS=689} [2024-10-11 14:28:26,190 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2024-10-11 14:28:26,190 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 689 transitions, 12899 flow [2024-10-11 14:28:26,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 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) [2024-10-11 14:28:26,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:28:26,190 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:28:26,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:28:26,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:26,391 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:28:26,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:28:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2081178062, now seen corresponding path program 4 times [2024-10-11 14:28:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:28:26,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106850585] [2024-10-11 14:28:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:28:26,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:28:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:28:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:26,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:28:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106850585] [2024-10-11 14:28:26,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106850585] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:28:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145750733] [2024-10-11 14:28:26,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:28:26,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:28:26,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:28:26,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:28:26,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:28:26,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:28:26,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:28:26,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 14:28:26,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:28:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:28:31,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:28:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:28:31,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145750733] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:28:31,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:28:31,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-10-11 14:28:31,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346202764] [2024-10-11 14:28:31,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:28:31,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:28:31,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:28:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:28:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2024-10-11 14:28:31,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:28:31,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 689 transitions, 12899 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-10-11 14:28:31,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:28:31,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:28:31,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:28:35,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:28:47,776 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 39 DAG size of output: 31 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 14:28:51,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:28:56,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:00,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:02,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:07,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:10,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-11 14:29:11,481 INFO L124 PetriNetUnfolderBase]: 5411/9896 cut-off events. [2024-10-11 14:29:11,481 INFO L125 PetriNetUnfolderBase]: For 137461/137461 co-relation queries the response was YES. [2024-10-11 14:29:11,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74589 conditions, 9896 events. 5411/9896 cut-off events. For 137461/137461 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 76161 event pairs, 467 based on Foata normal form. 18/9913 useless extension candidates. Maximal degree in co-relation 73554. Up to 7069 conditions per place. [2024-10-11 14:29:11,558 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 798 selfloop transitions, 356 changer transitions 19/1176 dead transitions. [2024-10-11 14:29:11,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 1176 transitions, 23623 flow [2024-10-11 14:29:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:29:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:29:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 313 transitions. [2024-10-11 14:29:11,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6804347826086956 [2024-10-11 14:29:11,560 INFO L175 Difference]: Start difference. First operand has 150 places, 689 transitions, 12899 flow. Second operand 23 states and 313 transitions. [2024-10-11 14:29:11,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 1176 transitions, 23623 flow [2024-10-11 14:29:12,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1176 transitions, 22695 flow, removed 438 selfloop flow, removed 7 redundant places. [2024-10-11 14:29:12,298 INFO L231 Difference]: Finished difference. Result has 176 places, 969 transitions, 19582 flow [2024-10-11 14:29:12,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=12345, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=19582, PETRI_PLACES=176, PETRI_TRANSITIONS=969} [2024-10-11 14:29:12,299 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2024-10-11 14:29:12,299 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 969 transitions, 19582 flow [2024-10-11 14:29:12,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-10-11 14:29:12,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:12,299 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:12,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:29:12,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:29:12,500 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:12,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash -140309619, now seen corresponding path program 5 times [2024-10-11 14:29:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:12,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641459796] [2024-10-11 14:29:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:12,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:12,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641459796] [2024-10-11 14:29:12,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641459796] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987206572] [2024-10-11 14:29:12,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:29:12,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:12,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:12,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:12,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:29:12,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-11 14:29:12,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:12,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:29:12,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:12,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:12,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987206572] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:12,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:12,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-10-11 14:29:12,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486630441] [2024-10-11 14:29:12,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:12,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:29:12,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:12,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:29:12,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:29:12,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:29:12,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 969 transitions, 19582 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-10-11 14:29:12,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:12,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:29:12,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:15,898 INFO L124 PetriNetUnfolderBase]: 6607/11917 cut-off events. [2024-10-11 14:29:15,898 INFO L125 PetriNetUnfolderBase]: For 190281/190281 co-relation queries the response was YES. [2024-10-11 14:29:15,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96512 conditions, 11917 events. 6607/11917 cut-off events. For 190281/190281 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 93903 event pairs, 459 based on Foata normal form. 142/12059 useless extension candidates. Maximal degree in co-relation 93531. Up to 5113 conditions per place. [2024-10-11 14:29:15,989 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 873 selfloop transitions, 690 changer transitions 0/1566 dead transitions. [2024-10-11 14:29:15,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1566 transitions, 33299 flow [2024-10-11 14:29:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:29:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:29:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-10-11 14:29:15,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-10-11 14:29:15,991 INFO L175 Difference]: Start difference. First operand has 176 places, 969 transitions, 19582 flow. Second operand 14 states and 163 transitions. [2024-10-11 14:29:15,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 1566 transitions, 33299 flow [2024-10-11 14:29:17,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1566 transitions, 31908 flow, removed 664 selfloop flow, removed 9 redundant places. [2024-10-11 14:29:17,308 INFO L231 Difference]: Finished difference. Result has 188 places, 1219 transitions, 26395 flow [2024-10-11 14:29:17,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=18554, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26395, PETRI_PLACES=188, PETRI_TRANSITIONS=1219} [2024-10-11 14:29:17,309 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2024-10-11 14:29:17,309 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 1219 transitions, 26395 flow [2024-10-11 14:29:17,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-10-11 14:29:17,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:17,310 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:17,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:29:17,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:17,510 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:17,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash 291719988, now seen corresponding path program 6 times [2024-10-11 14:29:17,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:17,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281170108] [2024-10-11 14:29:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:17,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:17,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:17,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281170108] [2024-10-11 14:29:17,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281170108] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:17,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638270835] [2024-10-11 14:29:17,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:29:17,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:17,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:17,780 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:17,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:29:17,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-11 14:29:17,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:17,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 14:29:17,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:18,226 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:29:18,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638270835] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:18,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:18,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-10-11 14:29:18,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253669212] [2024-10-11 14:29:18,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:18,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:29:18,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:29:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:29:18,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:29:18,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 1219 transitions, 26395 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-10-11 14:29:18,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:18,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:29:18,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:24,557 INFO L124 PetriNetUnfolderBase]: 7534/13547 cut-off events. [2024-10-11 14:29:24,557 INFO L125 PetriNetUnfolderBase]: For 294548/294548 co-relation queries the response was YES. [2024-10-11 14:29:24,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121526 conditions, 13547 events. 7534/13547 cut-off events. For 294548/294548 co-relation queries the response was YES. Maximal size of possible extension queue 918. Compared 108710 event pairs, 536 based on Foata normal form. 22/13569 useless extension candidates. Maximal degree in co-relation 117960. Up to 6496 conditions per place. [2024-10-11 14:29:24,678 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 596 selfloop transitions, 1059 changer transitions 15/1673 dead transitions. [2024-10-11 14:29:24,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1673 transitions, 39477 flow [2024-10-11 14:29:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 14:29:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 14:29:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 285 transitions. [2024-10-11 14:29:24,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-10-11 14:29:24,682 INFO L175 Difference]: Start difference. First operand has 188 places, 1219 transitions, 26395 flow. Second operand 24 states and 285 transitions. [2024-10-11 14:29:24,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1673 transitions, 39477 flow [2024-10-11 14:29:26,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1673 transitions, 38875 flow, removed 283 selfloop flow, removed 3 redundant places. [2024-10-11 14:29:26,929 INFO L231 Difference]: Finished difference. Result has 217 places, 1541 transitions, 38525 flow [2024-10-11 14:29:26,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=24665, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=720, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=38525, PETRI_PLACES=217, PETRI_TRANSITIONS=1541} [2024-10-11 14:29:26,930 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2024-10-11 14:29:26,930 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 1541 transitions, 38525 flow [2024-10-11 14:29:26,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 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) [2024-10-11 14:29:26,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:26,931 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:26,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 14:29:27,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:29:27,131 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:27,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1305371769, now seen corresponding path program 7 times [2024-10-11 14:29:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18381208] [2024-10-11 14:29:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:29:27,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:27,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18381208] [2024-10-11 14:29:27,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18381208] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:27,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103204600] [2024-10-11 14:29:27,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:29:27,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:27,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:27,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:27,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:29:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:27,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 14:29:27,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:27,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:29:27,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103204600] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:27,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:27,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-10-11 14:29:27,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830286652] [2024-10-11 14:29:27,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:27,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:29:27,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:27,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:29:27,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:29:27,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:29:27,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 1541 transitions, 38525 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-10-11 14:29:27,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:27,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:29:27,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:33,490 INFO L124 PetriNetUnfolderBase]: 8108/14549 cut-off events. [2024-10-11 14:29:33,490 INFO L125 PetriNetUnfolderBase]: For 361299/361308 co-relation queries the response was YES. [2024-10-11 14:29:33,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139778 conditions, 14549 events. 8108/14549 cut-off events. For 361299/361308 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 118259 event pairs, 59 based on Foata normal form. 71/14620 useless extension candidates. Maximal degree in co-relation 135707. Up to 4469 conditions per place. [2024-10-11 14:29:33,618 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1455 selfloop transitions, 647 changer transitions 0/2105 dead transitions. [2024-10-11 14:29:33,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 2105 transitions, 52540 flow [2024-10-11 14:29:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 14:29:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 14:29:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-10-11 14:29:33,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-10-11 14:29:33,619 INFO L175 Difference]: Start difference. First operand has 217 places, 1541 transitions, 38525 flow. Second operand 15 states and 167 transitions. [2024-10-11 14:29:33,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 2105 transitions, 52540 flow [2024-10-11 14:29:36,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 2105 transitions, 50173 flow, removed 1169 selfloop flow, removed 7 redundant places. [2024-10-11 14:29:36,854 INFO L231 Difference]: Finished difference. Result has 228 places, 1654 transitions, 41606 flow [2024-10-11 14:29:36,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=36315, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=532, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=41606, PETRI_PLACES=228, PETRI_TRANSITIONS=1654} [2024-10-11 14:29:36,856 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2024-10-11 14:29:36,856 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 1654 transitions, 41606 flow [2024-10-11 14:29:36,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2024-10-11 14:29:36,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:36,857 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:36,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:29:37,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 14:29:37,057 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:37,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1338616304, now seen corresponding path program 8 times [2024-10-11 14:29:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:37,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474964489] [2024-10-11 14:29:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:37,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:37,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:37,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474964489] [2024-10-11 14:29:37,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474964489] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:37,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564577998] [2024-10-11 14:29:37,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:29:37,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:37,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:37,350 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:37,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:29:37,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:29:37,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:37,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 14:29:37,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:37,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:29:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:29:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564577998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:29:37,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:29:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-10-11 14:29:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046704730] [2024-10-11 14:29:37,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:29:37,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:29:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:29:37,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:29:37,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:29:37,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-10-11 14:29:37,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 1654 transitions, 41606 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 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) [2024-10-11 14:29:37,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:29:37,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-10-11 14:29:37,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:29:48,276 INFO L124 PetriNetUnfolderBase]: 9958/17804 cut-off events. [2024-10-11 14:29:48,276 INFO L125 PetriNetUnfolderBase]: For 484134/484134 co-relation queries the response was YES. [2024-10-11 14:29:48,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177519 conditions, 17804 events. 9958/17804 cut-off events. For 484134/484134 co-relation queries the response was YES. Maximal size of possible extension queue 1324. Compared 149281 event pairs, 653 based on Foata normal form. 41/17845 useless extension candidates. Maximal degree in co-relation 172487. Up to 7886 conditions per place. [2024-10-11 14:29:48,437 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 746 selfloop transitions, 1611 changer transitions 29/2389 dead transitions. [2024-10-11 14:29:48,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 2389 transitions, 64671 flow [2024-10-11 14:29:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 14:29:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-11 14:29:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 304 transitions. [2024-10-11 14:29:48,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-10-11 14:29:48,438 INFO L175 Difference]: Start difference. First operand has 228 places, 1654 transitions, 41606 flow. Second operand 26 states and 304 transitions. [2024-10-11 14:29:48,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 2389 transitions, 64671 flow [2024-10-11 14:29:52,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 2389 transitions, 63573 flow, removed 135 selfloop flow, removed 4 redundant places. [2024-10-11 14:29:52,989 INFO L231 Difference]: Finished difference. Result has 262 places, 2204 transitions, 62844 flow [2024-10-11 14:29:52,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=41015, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=62844, PETRI_PLACES=262, PETRI_TRANSITIONS=2204} [2024-10-11 14:29:52,992 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2024-10-11 14:29:52,992 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 2204 transitions, 62844 flow [2024-10-11 14:29:52,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 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) [2024-10-11 14:29:52,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:29:52,992 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:29:53,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 14:29:53,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:29:53,193 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:29:53,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:29:53,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1681612208, now seen corresponding path program 9 times [2024-10-11 14:29:53,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:29:53,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712528684] [2024-10-11 14:29:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:29:53,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:29:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:29:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:53,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:29:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712528684] [2024-10-11 14:29:53,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712528684] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:29:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225688864] [2024-10-11 14:29:53,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:29:53,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:29:53,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:29:53,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:29:53,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:29:53,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:29:53,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:29:53,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 14:29:53,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:29:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:29:53,857 INFO L311 TraceCheckSpWp]: Computing backward predicates...