./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-theta/unwind2-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 84506b1a5f2f1a1be74252915eb3882c15865a3a673842f14f5796dbb89eb736 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:57:05,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:57:05,315 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:57:05,320 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:57:05,321 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:57:05,348 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:57:05,349 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:57:05,349 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:57:05,350 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:57:05,351 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:57:05,352 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:57:05,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:57:05,352 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:57:05,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:57:05,354 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:57:05,354 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:57:05,355 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:57:05,355 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:57:05,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:57:05,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:57:05,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:57:05,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:57:05,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:57:05,359 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:57:05,359 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:57:05,359 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:57:05,359 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:57:05,359 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:57:05,360 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:57:05,360 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:57:05,360 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:57:05,360 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:57:05,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:57:05,360 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:57:05,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:57:05,361 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:57:05,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:57:05,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:57:05,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:57:05,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:57:05,361 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:57:05,362 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:57:05,363 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 84506b1a5f2f1a1be74252915eb3882c15865a3a673842f14f5796dbb89eb736 [2024-11-22 13:57:05,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:57:05,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:57:05,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:57:05,604 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:57:05,605 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:57:05,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind2-1.i [2024-11-22 13:57:06,873 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:57:07,199 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:57:07,200 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-1.i [2024-11-22 13:57:07,232 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1992417d2/7eca51a5f1e14acfabb11f0395e80a9d/FLAG716cad868 [2024-11-22 13:57:07,253 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1992417d2/7eca51a5f1e14acfabb11f0395e80a9d [2024-11-22 13:57:07,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:57:07,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:57:07,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:57:07,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:57:07,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:57:07,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e3426d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07, skipping insertion in model container [2024-11-22 13:57:07,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,304 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:57:07,599 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-1.i[33026,33039] [2024-11-22 13:57:07,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:57:07,620 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:57:07,646 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-1.i[33026,33039] [2024-11-22 13:57:07,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:57:07,678 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:57:07,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07 WrapperNode [2024-11-22 13:57:07,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:57:07,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:57:07,680 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:57:07,680 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:57:07,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,724 INFO L138 Inliner]: procedures = 169, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 81 [2024-11-22 13:57:07,725 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:57:07,725 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:57:07,726 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:57:07,726 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:57:07,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,736 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,745 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-22 13:57:07,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,746 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,752 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,754 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,755 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:57:07,757 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:57:07,757 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:57:07,757 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:57:07,758 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (1/1) ... [2024-11-22 13:57:07,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:57:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:57:07,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 13:57:07,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 13:57:07,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:57:07,838 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-22 13:57:07,839 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-22 13:57:07,839 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-22 13:57:07,839 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-22 13:57:07,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:57:07,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:57:07,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:57:07,842 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:57:07,978 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:57:07,980 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:57:08,125 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:57:08,125 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:57:08,216 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:57:08,216 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-22 13:57:08,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:57:08 BoogieIcfgContainer [2024-11-22 13:57:08,217 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:57:08,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:57:08,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:57:08,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:57:08,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:57:07" (1/3) ... [2024-11-22 13:57:08,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c93ac98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:57:08, skipping insertion in model container [2024-11-22 13:57:08,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:07" (2/3) ... [2024-11-22 13:57:08,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c93ac98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:57:08, skipping insertion in model container [2024-11-22 13:57:08,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:57:08" (3/3) ... [2024-11-22 13:57:08,226 INFO L112 eAbstractionObserver]: Analyzing ICFG unwind2-1.i [2024-11-22 13:57:08,241 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:57:08,241 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-22 13:57:08,241 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:57:08,276 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:57:08,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2024-11-22 13:57:08,346 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-22 13:57:08,346 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:57:08,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-11-22 13:57:08,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2024-11-22 13:57:08,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 61 flow [2024-11-22 13:57:08,361 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:57:08,366 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;@4b37d8ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:57:08,367 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-22 13:57:08,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:57:08,380 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-11-22 13:57:08,380 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:57:08,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:08,381 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:08,382 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:08,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1841696643, now seen corresponding path program 1 times [2024-11-22 13:57:08,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405417166] [2024-11-22 13:57:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:08,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:08,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:08,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405417166] [2024-11-22 13:57:08,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405417166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:57:08,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:57:08,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 13:57:08,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643658828] [2024-11-22 13:57:08,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:57:08,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 13:57:08,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 13:57:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 13:57:08,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-22 13:57:08,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:08,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:08,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-22 13:57:08,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:08,934 INFO L124 PetriNetUnfolderBase]: 211/450 cut-off events. [2024-11-22 13:57:08,934 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-22 13:57:08,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 450 events. 211/450 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2194 event pairs, 26 based on Foata normal form. 48/420 useless extension candidates. Maximal degree in co-relation 780. Up to 153 conditions per place. [2024-11-22 13:57:08,941 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 49 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-11-22 13:57:08,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 63 transitions, 261 flow [2024-11-22 13:57:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:57:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:57:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-11-22 13:57:08,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-11-22 13:57:08,956 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 61 flow. Second operand 7 states and 122 transitions. [2024-11-22 13:57:08,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 63 transitions, 261 flow [2024-11-22 13:57:08,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 63 transitions, 251 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 13:57:08,961 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 101 flow [2024-11-22 13:57:08,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2024-11-22 13:57:08,965 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2024-11-22 13:57:08,967 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 101 flow [2024-11-22 13:57:08,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:08,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:08,967 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:08,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:57:08,968 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:08,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1257990492, now seen corresponding path program 1 times [2024-11-22 13:57:08,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:08,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650756311] [2024-11-22 13:57:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:08,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:09,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:09,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650756311] [2024-11-22 13:57:09,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650756311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:57:09,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232745100] [2024-11-22 13:57:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:09,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:57:09,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:57:09,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:57:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:09,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 13:57:09,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:57:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:09,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:57:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232745100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:57:09,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:57:09,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-11-22 13:57:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918595428] [2024-11-22 13:57:09,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:57:09,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 13:57:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 13:57:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-22 13:57:09,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-22 13:57:09,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 101 flow. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:09,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:09,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-22 13:57:09,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:09,606 INFO L124 PetriNetUnfolderBase]: 424/821 cut-off events. [2024-11-22 13:57:09,606 INFO L125 PetriNetUnfolderBase]: For 123/131 co-relation queries the response was YES. [2024-11-22 13:57:09,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 821 events. 424/821 cut-off events. For 123/131 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4339 event pairs, 61 based on Foata normal form. 8/672 useless extension candidates. Maximal degree in co-relation 1714. Up to 274 conditions per place. [2024-11-22 13:57:09,611 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 60 selfloop transitions, 14 changer transitions 3/85 dead transitions. [2024-11-22 13:57:09,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 85 transitions, 395 flow [2024-11-22 13:57:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 13:57:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 13:57:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-11-22 13:57:09,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-11-22 13:57:09,613 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 101 flow. Second operand 9 states and 147 transitions. [2024-11-22 13:57:09,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 85 transitions, 395 flow [2024-11-22 13:57:09,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 85 transitions, 384 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 13:57:09,617 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 160 flow [2024-11-22 13:57:09,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-11-22 13:57:09,618 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-11-22 13:57:09,618 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 160 flow [2024-11-22 13:57:09,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:09,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:09,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:09,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 13:57:09,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:09,820 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:09,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash -592937479, now seen corresponding path program 1 times [2024-11-22 13:57:09,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:09,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885455349] [2024-11-22 13:57:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:09,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:09,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:09,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885455349] [2024-11-22 13:57:09,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885455349] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:57:09,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:57:09,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 13:57:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300143147] [2024-11-22 13:57:09,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:57:09,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 13:57:09,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:09,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 13:57:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 13:57:09,920 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-22 13:57:09,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:09,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:09,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-22 13:57:09,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:10,067 INFO L124 PetriNetUnfolderBase]: 425/915 cut-off events. [2024-11-22 13:57:10,067 INFO L125 PetriNetUnfolderBase]: For 933/947 co-relation queries the response was YES. [2024-11-22 13:57:10,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 915 events. 425/915 cut-off events. For 933/947 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5313 event pairs, 89 based on Foata normal form. 0/828 useless extension candidates. Maximal degree in co-relation 1816. Up to 298 conditions per place. [2024-11-22 13:57:10,072 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 70 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-22 13:57:10,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 88 transitions, 610 flow [2024-11-22 13:57:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:57:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:57:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-11-22 13:57:10,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-22 13:57:10,073 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 160 flow. Second operand 7 states and 112 transitions. [2024-11-22 13:57:10,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 88 transitions, 610 flow [2024-11-22 13:57:10,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 88 transitions, 564 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-11-22 13:57:10,078 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 208 flow [2024-11-22 13:57:10,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-11-22 13:57:10,082 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2024-11-22 13:57:10,083 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 208 flow [2024-11-22 13:57:10,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:10,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:10,084 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:10,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 13:57:10,084 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:10,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash 342968995, now seen corresponding path program 2 times [2024-11-22 13:57:10,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:10,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026253847] [2024-11-22 13:57:10,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:57:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:10,096 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:57:10,096 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:57:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:10,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026253847] [2024-11-22 13:57:10,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026253847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:57:10,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555567227] [2024-11-22 13:57:10,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:57:10,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:10,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:57:10,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:57:10,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:57:10,216 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:57:10,217 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:57:10,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 13:57:10,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:57:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:10,361 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 13:57:10,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555567227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:57:10,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 13:57:10,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-11-22 13:57:10,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044707110] [2024-11-22 13:57:10,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:57:10,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 13:57:10,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:10,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 13:57:10,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-22 13:57:10,372 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-22 13:57:10,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:10,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:10,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-22 13:57:10,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:10,589 INFO L124 PetriNetUnfolderBase]: 373/802 cut-off events. [2024-11-22 13:57:10,589 INFO L125 PetriNetUnfolderBase]: For 755/765 co-relation queries the response was YES. [2024-11-22 13:57:10,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 802 events. 373/802 cut-off events. For 755/765 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4543 event pairs, 85 based on Foata normal form. 26/754 useless extension candidates. Maximal degree in co-relation 2321. Up to 309 conditions per place. [2024-11-22 13:57:10,593 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 67 selfloop transitions, 13 changer transitions 6/94 dead transitions. [2024-11-22 13:57:10,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 94 transitions, 611 flow [2024-11-22 13:57:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 13:57:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 13:57:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-11-22 13:57:10,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-11-22 13:57:10,595 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 208 flow. Second operand 10 states and 154 transitions. [2024-11-22 13:57:10,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 94 transitions, 611 flow [2024-11-22 13:57:10,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 578 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-22 13:57:10,599 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 246 flow [2024-11-22 13:57:10,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=246, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-22 13:57:10,600 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2024-11-22 13:57:10,600 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 246 flow [2024-11-22 13:57:10,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:10,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:10,601 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:10,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:57:10,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-22 13:57:10,805 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:10,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:10,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1201223248, now seen corresponding path program 1 times [2024-11-22 13:57:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:10,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248802406] [2024-11-22 13:57:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:10,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:10,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248802406] [2024-11-22 13:57:10,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248802406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:57:10,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269920412] [2024-11-22 13:57:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:10,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:10,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:57:10,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:57:10,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:57:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:10,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 13:57:10,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:57:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:10,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:57:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:10,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269920412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:57:10,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:57:10,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-22 13:57:10,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119495698] [2024-11-22 13:57:10,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:57:10,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 13:57:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 13:57:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-22 13:57:10,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-22 13:57:10,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 246 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:10,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:10,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-22 13:57:10,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:11,178 INFO L124 PetriNetUnfolderBase]: 437/919 cut-off events. [2024-11-22 13:57:11,178 INFO L125 PetriNetUnfolderBase]: For 1262/1280 co-relation queries the response was YES. [2024-11-22 13:57:11,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2865 conditions, 919 events. 437/919 cut-off events. For 1262/1280 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5274 event pairs, 108 based on Foata normal form. 0/833 useless extension candidates. Maximal degree in co-relation 2600. Up to 351 conditions per place. [2024-11-22 13:57:11,183 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 76 selfloop transitions, 15 changer transitions 1/100 dead transitions. [2024-11-22 13:57:11,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 100 transitions, 761 flow [2024-11-22 13:57:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 13:57:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 13:57:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-22 13:57:11,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-22 13:57:11,185 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 246 flow. Second operand 9 states and 144 transitions. [2024-11-22 13:57:11,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 100 transitions, 761 flow [2024-11-22 13:57:11,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 741 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-22 13:57:11,190 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 298 flow [2024-11-22 13:57:11,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=298, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2024-11-22 13:57:11,191 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-11-22 13:57:11,191 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 298 flow [2024-11-22 13:57:11,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:11,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:11,191 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:11,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 13:57:11,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:11,396 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:11,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1929875536, now seen corresponding path program 1 times [2024-11-22 13:57:11,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:11,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064313387] [2024-11-22 13:57:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:11,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064313387] [2024-11-22 13:57:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064313387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:57:11,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:57:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 13:57:11,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836574900] [2024-11-22 13:57:11,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:57:11,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 13:57:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 13:57:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 13:57:11,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-22 13:57:11,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 298 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:11,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:11,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-22 13:57:11,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:11,564 INFO L124 PetriNetUnfolderBase]: 395/833 cut-off events. [2024-11-22 13:57:11,564 INFO L125 PetriNetUnfolderBase]: For 1439/1455 co-relation queries the response was YES. [2024-11-22 13:57:11,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2964 conditions, 833 events. 395/833 cut-off events. For 1439/1455 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4551 event pairs, 115 based on Foata normal form. 12/772 useless extension candidates. Maximal degree in co-relation 2682. Up to 417 conditions per place. [2024-11-22 13:57:11,568 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 47 selfloop transitions, 12 changer transitions 1/67 dead transitions. [2024-11-22 13:57:11,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 545 flow [2024-11-22 13:57:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:57:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:57:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-11-22 13:57:11,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-22 13:57:11,570 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 298 flow. Second operand 6 states and 93 transitions. [2024-11-22 13:57:11,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 545 flow [2024-11-22 13:57:11,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 496 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-22 13:57:11,575 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 279 flow [2024-11-22 13:57:11,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2024-11-22 13:57:11,576 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-11-22 13:57:11,576 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 279 flow [2024-11-22 13:57:11,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:11,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:11,576 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:11,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 13:57:11,576 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:11,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392078, now seen corresponding path program 1 times [2024-11-22 13:57:11,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:11,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447671191] [2024-11-22 13:57:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:57:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:11,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:11,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447671191] [2024-11-22 13:57:11,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447671191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:57:11,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:57:11,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 13:57:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885491328] [2024-11-22 13:57:11,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:57:11,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 13:57:11,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 13:57:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 13:57:11,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-22 13:57:11,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:11,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:11,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-22 13:57:11,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:11,760 INFO L124 PetriNetUnfolderBase]: 409/878 cut-off events. [2024-11-22 13:57:11,760 INFO L125 PetriNetUnfolderBase]: For 1516/1540 co-relation queries the response was YES. [2024-11-22 13:57:11,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2934 conditions, 878 events. 409/878 cut-off events. For 1516/1540 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4918 event pairs, 114 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 2811. Up to 439 conditions per place. [2024-11-22 13:57:11,765 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 51 selfloop transitions, 12 changer transitions 2/72 dead transitions. [2024-11-22 13:57:11,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 551 flow [2024-11-22 13:57:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:57:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:57:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-11-22 13:57:11,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-11-22 13:57:11,766 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 279 flow. Second operand 6 states and 97 transitions. [2024-11-22 13:57:11,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 551 flow [2024-11-22 13:57:11,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 522 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-22 13:57:11,771 INFO L231 Difference]: Finished difference. Result has 65 places, 46 transitions, 296 flow [2024-11-22 13:57:11,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=65, PETRI_TRANSITIONS=46} [2024-11-22 13:57:11,772 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-11-22 13:57:11,772 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 46 transitions, 296 flow [2024-11-22 13:57:11,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:11,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:11,773 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:11,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 13:57:11,773 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:11,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1416754393, now seen corresponding path program 2 times [2024-11-22 13:57:11,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:11,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126380158] [2024-11-22 13:57:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:57:11,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:11,783 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:57:11,783 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:57:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:11,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:57:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126380158] [2024-11-22 13:57:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126380158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:57:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286495448] [2024-11-22 13:57:11,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:57:11,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:57:11,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:57:11,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:57:11,940 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:57:11,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:57:11,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 13:57:11,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:57:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:12,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:57:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:57:12,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286495448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:57:12,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:57:12,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-22 13:57:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992734739] [2024-11-22 13:57:12,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:57:12,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 13:57:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:57:12,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 13:57:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-11-22 13:57:12,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-11-22 13:57:12,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 46 transitions, 296 flow. Second operand has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:12,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:57:12,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-11-22 13:57:12,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:57:12,733 INFO L124 PetriNetUnfolderBase]: 751/1392 cut-off events. [2024-11-22 13:57:12,734 INFO L125 PetriNetUnfolderBase]: For 2958/3010 co-relation queries the response was YES. [2024-11-22 13:57:12,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5016 conditions, 1392 events. 751/1392 cut-off events. For 2958/3010 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7668 event pairs, 127 based on Foata normal form. 0/1264 useless extension candidates. Maximal degree in co-relation 4610. Up to 375 conditions per place. [2024-11-22 13:57:12,741 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 106 selfloop transitions, 22 changer transitions 31/164 dead transitions. [2024-11-22 13:57:12,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 164 transitions, 1325 flow [2024-11-22 13:57:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 13:57:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 13:57:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 216 transitions. [2024-11-22 13:57:12,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-22 13:57:12,742 INFO L175 Difference]: Start difference. First operand has 65 places, 46 transitions, 296 flow. Second operand 15 states and 216 transitions. [2024-11-22 13:57:12,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 164 transitions, 1325 flow [2024-11-22 13:57:12,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 164 transitions, 1284 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-22 13:57:12,750 INFO L231 Difference]: Finished difference. Result has 82 places, 52 transitions, 409 flow [2024-11-22 13:57:12,751 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=409, PETRI_PLACES=82, PETRI_TRANSITIONS=52} [2024-11-22 13:57:12,751 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-11-22 13:57:12,752 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 52 transitions, 409 flow [2024-11-22 13:57:12,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:57:12,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:57:12,753 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:57:12,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 13:57:12,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:57:12,953 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-22 13:57:12,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:57:12,954 INFO L85 PathProgramCache]: Analyzing trace with hash -580451013, now seen corresponding path program 1 times [2024-11-22 13:57:12,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:57:12,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932735452] [2024-11-22 13:57:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:57:12,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:57:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:57:12,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:57:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:57:12,983 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:57:12,984 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:57:12,985 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-11-22 13:57:12,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-22 13:57:12,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-11-22 13:57:12,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-22 13:57:12,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-22 13:57:12,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-22 13:57:12,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 13:57:12,987 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2024-11-22 13:57:13,016 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-22 13:57:13,016 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-22 13:57:13,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:57:13 BasicIcfg [2024-11-22 13:57:13,022 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-22 13:57:13,022 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-22 13:57:13,022 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-22 13:57:13,022 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-22 13:57:13,023 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:57:08" (3/4) ... [2024-11-22 13:57:13,023 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-22 13:57:13,067 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-22 13:57:13,068 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-22 13:57:13,068 INFO L158 Benchmark]: Toolchain (without parser) took 5811.46ms. Allocated memory was 157.3MB in the beginning and 281.0MB in the end (delta: 123.7MB). Free memory was 125.5MB in the beginning and 183.7MB in the end (delta: -58.2MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2024-11-22 13:57:13,070 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 157.3MB. Free memory was 115.1MB in the beginning and 114.9MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-22 13:57:13,070 INFO L158 Benchmark]: CACSL2BoogieTranslator took 419.65ms. Allocated memory is still 157.3MB. Free memory was 125.0MB in the beginning and 102.4MB in the end (delta: 22.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-22 13:57:13,071 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.64ms. Allocated memory is still 157.3MB. Free memory was 102.4MB in the beginning and 100.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-22 13:57:13,071 INFO L158 Benchmark]: Boogie Preprocessor took 30.97ms. Allocated memory is still 157.3MB. Free memory was 100.3MB in the beginning and 98.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-22 13:57:13,071 INFO L158 Benchmark]: RCFGBuilder took 459.78ms. Allocated memory is still 157.3MB. Free memory was 98.2MB in the beginning and 77.3MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-22 13:57:13,071 INFO L158 Benchmark]: TraceAbstraction took 4803.13ms. Allocated memory was 157.3MB in the beginning and 281.0MB in the end (delta: 123.7MB). Free memory was 76.7MB in the beginning and 187.9MB in the end (delta: -111.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-22 13:57:13,071 INFO L158 Benchmark]: Witness Printer took 45.93ms. Allocated memory is still 281.0MB. Free memory was 186.9MB in the beginning and 183.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-22 13:57:13,073 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 157.3MB. Free memory was 115.1MB in the beginning and 114.9MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 419.65ms. Allocated memory is still 157.3MB. Free memory was 125.0MB in the beginning and 102.4MB in the end (delta: 22.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.64ms. Allocated memory is still 157.3MB. Free memory was 102.4MB in the beginning and 100.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.97ms. Allocated memory is still 157.3MB. Free memory was 100.3MB in the beginning and 98.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 459.78ms. Allocated memory is still 157.3MB. Free memory was 98.2MB in the beginning and 77.3MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 4803.13ms. Allocated memory was 157.3MB in the beginning and 281.0MB in the end (delta: 123.7MB). Free memory was 76.7MB in the beginning and 187.9MB in the end (delta: -111.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 45.93ms. Allocated memory is still 281.0MB. Free memory was 186.9MB in the beginning and 183.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 753]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L754] 0 int _N; [L755] 0 atomic_int limit; [L775] 0 _N = 1 [L776] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L776] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L777] 0 pthread_t t1, t2; [L778] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [_N=1, limit=0, t1=0] [L757] 1 int i, bound; [L758] 1 int lim = _N; VAL [\old(arg)={0:0}, _N=1, arg={0:0}, lim=1, limit=0] [L779] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [_N=1, limit=0, t1=0, t2=1] [L766] 2 int i, bound; [L767] 2 int lim = _N + 1; VAL [\old(arg)={0:0}, _N=1, arg={0:0}, lim=2, limit=0] [L768] 2 limit = lim VAL [\old(arg)={0:0}, _N=1, arg={0:0}, lim=2, limit=2] [L759] 1 limit = lim VAL [\old(arg)={0:0}, _N=1, arg={0:0}, lim=1, limit=1] [L769] 2 bound = limit [L770] 2 i = 0 VAL [\old(arg)={0:0}, _N=1, arg={0:0}, bound=1, i=0, lim=2, limit=1] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\old(arg)={0:0}, _N=1, arg={0:0}, bound=1, i=1, lim=2, limit=1] [L770] COND FALSE 2 !(i < bound) [L771] CALL 2 __VERIFIER_assert(i == lim) [L753] COND TRUE 2 !expression VAL [\old(expression)=0, _N=1, expression=0, limit=1] [L753] 2 reach_error() VAL [\old(expression)=0, _N=1, expression=0, limit=1] - UnprovableResult [Line: 779]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 753]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.7s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 837 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 825 mSDsluCounter, 170 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 136 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1416 IncrementalHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 34 mSDtfsCounter, 1416 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=409occurred in iteration=8, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 143 ConstructedInterpolants, 0 QuantifiedInterpolants, 555 SizeOfPredicates, 18 NumberOfNonLiveVariables, 274 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 5/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-22 13:57:13,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE