./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_safe-5.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 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:03:06,154 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:03:06,248 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:03:06,254 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:03:06,255 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:03:06,267 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:03:06,268 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:03:06,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:03:06,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:03:06,269 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:03:06,269 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:03:06,269 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:03:06,269 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:03:06,270 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:03:06,270 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:03:06,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:03:06,271 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:03:06,271 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:03:06,271 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:03:06,271 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:03:06,272 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:03:06,272 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:03:06,272 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:03:06,272 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:03:06,273 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:03:06,273 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:03:06,273 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:03:06,273 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:03:06,274 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:03:06,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:03:06,274 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:03:06,274 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:03:06,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:03:06,275 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:03:06,275 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:03:06,275 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:03:06,276 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:03:06,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:03:06,276 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:03:06,276 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:03:06,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:03:06,277 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:03:06,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 [2024-11-16 19:03:06,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:03:06,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:03:06,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:03:06,504 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:03:06,504 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:03:06,505 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-5.i [2024-11-16 19:03:07,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:03:08,093 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:03:08,093 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-5.i [2024-11-16 19:03:08,104 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121dc4132/739fb5ddbb954d1aa736cc37ed0020d6/FLAGc97caa4d9 [2024-11-16 19:03:08,126 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121dc4132/739fb5ddbb954d1aa736cc37ed0020d6 [2024-11-16 19:03:08,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:03:08,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:03:08,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:03:08,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:03:08,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:03:08,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e5d324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08, skipping insertion in model container [2024-11-16 19:03:08,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,167 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:03:08,418 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/fib_safe-5.i[30241,30254] [2024-11-16 19:03:08,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:03:08,459 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:03:08,489 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/fib_safe-5.i[30241,30254] [2024-11-16 19:03:08,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:03:08,533 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:03:08,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08 WrapperNode [2024-11-16 19:03:08,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:03:08,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:03:08,534 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:03:08,534 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:03:08,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,570 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-11-16 19:03:08,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:03:08,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:03:08,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:03:08,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:03:08,578 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,580 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,593 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-16 19:03:08,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,596 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,599 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,600 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,605 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:03:08,606 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:03:08,606 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:03:08,606 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:03:08,607 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (1/1) ... [2024-11-16 19:03:08,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:03:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:03:08,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:03:08,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:03:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-16 19:03:08,685 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-16 19:03:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-16 19:03:08,685 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-16 19:03:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:03:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:03:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:03:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:03:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:03:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:03:08,688 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:03:08,797 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:03:08,799 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:03:08,919 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:03:08,920 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:03:09,015 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:03:09,016 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:03:09,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:03:09 BoogieIcfgContainer [2024-11-16 19:03:09,016 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:03:09,018 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:03:09,018 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:03:09,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:03:09,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:03:08" (1/3) ... [2024-11-16 19:03:09,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7395536f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:03:09, skipping insertion in model container [2024-11-16 19:03:09,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:03:08" (2/3) ... [2024-11-16 19:03:09,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7395536f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:03:09, skipping insertion in model container [2024-11-16 19:03:09,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:03:09" (3/3) ... [2024-11-16 19:03:09,023 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2024-11-16 19:03:09,038 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:03:09,039 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:03:09,039 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:03:09,079 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:03:09,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 38 transitions, 84 flow [2024-11-16 19:03:09,140 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-16 19:03:09,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:03:09,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-16 19:03:09,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 38 transitions, 84 flow [2024-11-16 19:03:09,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 78 flow [2024-11-16 19:03:09,152 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:03:09,156 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;@62785fb4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:03:09,156 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:03:09,164 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:03:09,164 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-11-16 19:03:09,164 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:03:09,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:03:09,164 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:03:09,165 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:03:09,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:03:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash -850951809, now seen corresponding path program 1 times [2024-11-16 19:03:09,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:03:09,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068055307] [2024-11-16 19:03:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:09,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:03:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:03:09,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068055307] [2024-11-16 19:03:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068055307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:03:09,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:03:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:03:09,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953119266] [2024-11-16 19:03:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:03:09,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:03:09,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:03:09,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:03:09,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:03:09,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 38 [2024-11-16 19:03:09,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:09,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:03:09,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 38 [2024-11-16 19:03:09,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:03:09,579 INFO L124 PetriNetUnfolderBase]: 233/436 cut-off events. [2024-11-16 19:03:09,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:03:09,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 436 events. 233/436 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2024 event pairs, 159 based on Foata normal form. 90/493 useless extension candidates. Maximal degree in co-relation 791. Up to 358 conditions per place. [2024-11-16 19:03:09,591 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 21 selfloop transitions, 0 changer transitions 1/32 dead transitions. [2024-11-16 19:03:09,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 114 flow [2024-11-16 19:03:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:03:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:03:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-16 19:03:09,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-16 19:03:09,639 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 78 flow. Second operand 2 states and 50 transitions. [2024-11-16 19:03:09,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 114 flow [2024-11-16 19:03:09,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:03:09,646 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 66 flow [2024-11-16 19:03:09,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-11-16 19:03:09,653 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-11-16 19:03:09,654 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 66 flow [2024-11-16 19:03:09,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:09,655 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:03:09,655 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:03:09,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:03:09,657 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:03:09,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:03:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1924301250, now seen corresponding path program 1 times [2024-11-16 19:03:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:03:09,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203898040] [2024-11-16 19:03:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:09,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:03:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:09,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:03:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203898040] [2024-11-16 19:03:09,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203898040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:03:09,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:03:09,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:03:09,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773690247] [2024-11-16 19:03:09,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:03:09,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:03:09,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:03:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:03:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:03:09,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:03:09,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:09,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:03:09,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:03:09,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:03:09,913 INFO L124 PetriNetUnfolderBase]: 265/484 cut-off events. [2024-11-16 19:03:09,913 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:03:09,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 484 events. 265/484 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2238 event pairs, 39 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 899. Up to 305 conditions per place. [2024-11-16 19:03:09,916 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-16 19:03:09,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 146 flow [2024-11-16 19:03:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:03:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:03:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-16 19:03:09,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-11-16 19:03:09,919 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 66 flow. Second operand 3 states and 65 transitions. [2024-11-16 19:03:09,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 146 flow [2024-11-16 19:03:09,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:03:09,923 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 78 flow [2024-11-16 19:03:09,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-16 19:03:09,924 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-16 19:03:09,925 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 78 flow [2024-11-16 19:03:09,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:09,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:03:09,926 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:03:09,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:03:09,927 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:03:09,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:03:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1884553586, now seen corresponding path program 1 times [2024-11-16 19:03:09,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:03:09,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610786191] [2024-11-16 19:03:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:03:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:10,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:03:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610786191] [2024-11-16 19:03:10,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610786191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:03:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727653015] [2024-11-16 19:03:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:10,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:03:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:03:10,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:03:10,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:03:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:10,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 19:03:10,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:03:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:10,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:03:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:10,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727653015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:03:10,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:03:10,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-16 19:03:10,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716146551] [2024-11-16 19:03:10,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:03:10,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:03:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:03:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:03:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:03:10,174 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:03:10,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:10,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:03:10,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:03:10,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:03:10,338 INFO L124 PetriNetUnfolderBase]: 361/676 cut-off events. [2024-11-16 19:03:10,339 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-16 19:03:10,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1353 conditions, 676 events. 361/676 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3233 event pairs, 39 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1348. Up to 305 conditions per place. [2024-11-16 19:03:10,348 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 53 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-11-16 19:03:10,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 270 flow [2024-11-16 19:03:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:03:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:03:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-16 19:03:10,353 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-11-16 19:03:10,353 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 78 flow. Second operand 6 states and 127 transitions. [2024-11-16 19:03:10,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 270 flow [2024-11-16 19:03:10,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 67 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:03:10,355 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 112 flow [2024-11-16 19:03:10,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-11-16 19:03:10,356 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2024-11-16 19:03:10,356 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 112 flow [2024-11-16 19:03:10,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:10,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:03:10,362 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:03:10,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:03:10,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:03:10,563 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:03:10,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:03:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash 291669886, now seen corresponding path program 2 times [2024-11-16 19:03:10,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:03:10,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432599178] [2024-11-16 19:03:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:03:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:10,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:03:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432599178] [2024-11-16 19:03:10,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432599178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:03:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000281470] [2024-11-16 19:03:10,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:03:10,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:03:10,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:03:10,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:03:10,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:03:10,797 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:03:10,798 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:03:10,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:03:10,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:03:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:10,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:03:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:10,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000281470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:03:10,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:03:10,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-16 19:03:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142519922] [2024-11-16 19:03:10,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:03:10,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:03:10,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:03:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:03:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:03:10,885 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:03:10,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:10,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:03:10,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:03:10,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:03:11,062 INFO L124 PetriNetUnfolderBase]: 553/1060 cut-off events. [2024-11-16 19:03:11,062 INFO L125 PetriNetUnfolderBase]: For 1792/1792 co-relation queries the response was YES. [2024-11-16 19:03:11,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1060 events. 553/1060 cut-off events. For 1792/1792 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5266 event pairs, 39 based on Foata normal form. 96/1139 useless extension candidates. Maximal degree in co-relation 2373. Up to 305 conditions per place. [2024-11-16 19:03:11,068 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 101 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2024-11-16 19:03:11,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 121 transitions, 532 flow [2024-11-16 19:03:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 19:03:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-16 19:03:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-11-16 19:03:11,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5482456140350878 [2024-11-16 19:03:11,074 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 112 flow. Second operand 12 states and 250 transitions. [2024-11-16 19:03:11,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 121 transitions, 532 flow [2024-11-16 19:03:11,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 121 transitions, 524 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-16 19:03:11,080 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 188 flow [2024-11-16 19:03:11,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=188, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2024-11-16 19:03:11,081 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2024-11-16 19:03:11,082 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 188 flow [2024-11-16 19:03:11,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:11,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:03:11,082 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:03:11,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 19:03:11,283 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 [2024-11-16 19:03:11,283 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:03:11,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:03:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1326760610, now seen corresponding path program 3 times [2024-11-16 19:03:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:03:11,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997911844] [2024-11-16 19:03:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:03:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:11,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:03:11,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997911844] [2024-11-16 19:03:11,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997911844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:03:11,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271253843] [2024-11-16 19:03:11,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:03:11,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:03:11,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:03:11,490 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) [2024-11-16 19:03:11,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:03:11,557 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-16 19:03:11,557 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:03:11,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 19:03:11,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:03:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:11,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:03:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:11,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271253843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:03:11,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:03:11,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-11-16 19:03:11,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574647528] [2024-11-16 19:03:11,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:03:11,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 19:03:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:03:11,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 19:03:11,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:03:11,752 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:03:11,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 188 flow. Second operand has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:11,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:03:11,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:03:11,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:03:12,000 INFO L124 PetriNetUnfolderBase]: 617/1188 cut-off events. [2024-11-16 19:03:12,000 INFO L125 PetriNetUnfolderBase]: For 4208/4208 co-relation queries the response was YES. [2024-11-16 19:03:12,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3028 conditions, 1188 events. 617/1188 cut-off events. For 4208/4208 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5943 event pairs, 39 based on Foata normal form. 32/1203 useless extension candidates. Maximal degree in co-relation 3013. Up to 305 conditions per place. [2024-11-16 19:03:12,007 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 117 selfloop transitions, 13 changer transitions 0/139 dead transitions. [2024-11-16 19:03:12,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 139 transitions, 656 flow [2024-11-16 19:03:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:03:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:03:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 286 transitions. [2024-11-16 19:03:12,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5375939849624061 [2024-11-16 19:03:12,009 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 188 flow. Second operand 14 states and 286 transitions. [2024-11-16 19:03:12,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 139 transitions, 656 flow [2024-11-16 19:03:12,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 139 transitions, 616 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-16 19:03:12,015 INFO L231 Difference]: Finished difference. Result has 70 places, 43 transitions, 200 flow [2024-11-16 19:03:12,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=200, PETRI_PLACES=70, PETRI_TRANSITIONS=43} [2024-11-16 19:03:12,016 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2024-11-16 19:03:12,016 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 43 transitions, 200 flow [2024-11-16 19:03:12,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:12,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:03:12,017 INFO L204 CegarLoopForPetriNet]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:03:12,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:03:12,220 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 [2024-11-16 19:03:12,221 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:03:12,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:03:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash 114612734, now seen corresponding path program 4 times [2024-11-16 19:03:12,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:03:12,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88922736] [2024-11-16 19:03:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:12,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:03:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:13,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:03:13,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88922736] [2024-11-16 19:03:13,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88922736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:03:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371654244] [2024-11-16 19:03:13,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:03:13,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:03:13,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:03:13,119 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) [2024-11-16 19:03:13,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:03:13,196 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:03:13,196 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:03:13,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-16 19:03:13,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:03:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 110 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:14,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:03:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:14,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371654244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:03:14,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:03:14,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2024-11-16 19:03:14,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325051690] [2024-11-16 19:03:14,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:03:14,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-16 19:03:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:03:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-16 19:03:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2446, Unknown=0, NotChecked=0, Total=2862 [2024-11-16 19:03:14,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:03:14,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 43 transitions, 200 flow. Second operand has 54 states, 54 states have (on average 12.314814814814815) internal successors, (665), 54 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:14,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:03:14,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:03:14,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:03:27,923 INFO L124 PetriNetUnfolderBase]: 12499/24565 cut-off events. [2024-11-16 19:03:27,923 INFO L125 PetriNetUnfolderBase]: For 34179/34350 co-relation queries the response was YES. [2024-11-16 19:03:27,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57396 conditions, 24565 events. 12499/24565 cut-off events. For 34179/34350 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 208777 event pairs, 70 based on Foata normal form. 0/22968 useless extension candidates. Maximal degree in co-relation 57379. Up to 4083 conditions per place. [2024-11-16 19:03:28,036 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 505 selfloop transitions, 455 changer transitions 613/1582 dead transitions. [2024-11-16 19:03:28,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1582 transitions, 8713 flow [2024-11-16 19:03:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2024-11-16 19:03:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2024-11-16 19:03:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 2993 transitions. [2024-11-16 19:03:28,045 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5081494057724958 [2024-11-16 19:03:28,045 INFO L175 Difference]: Start difference. First operand has 70 places, 43 transitions, 200 flow. Second operand 155 states and 2993 transitions. [2024-11-16 19:03:28,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1582 transitions, 8713 flow [2024-11-16 19:03:28,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1582 transitions, 7835 flow, removed 150 selfloop flow, removed 11 redundant places. [2024-11-16 19:03:28,128 INFO L231 Difference]: Finished difference. Result has 275 places, 544 transitions, 3828 flow [2024-11-16 19:03:28,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=155, PETRI_FLOW=3828, PETRI_PLACES=275, PETRI_TRANSITIONS=544} [2024-11-16 19:03:28,130 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 239 predicate places. [2024-11-16 19:03:28,130 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 544 transitions, 3828 flow [2024-11-16 19:03:28,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 12.314814814814815) internal successors, (665), 54 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:28,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:03:28,131 INFO L204 CegarLoopForPetriNet]: trace histogram [13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:03:28,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 19:03:28,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:03:28,332 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:03:28,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:03:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -118222291, now seen corresponding path program 1 times [2024-11-16 19:03:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:03:28,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592022922] [2024-11-16 19:03:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:28,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:03:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:29,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:03:29,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592022922] [2024-11-16 19:03:29,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592022922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:03:29,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491969783] [2024-11-16 19:03:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:03:29,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:03:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:03:29,422 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:03:29,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:03:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:03:29,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-16 19:03:29,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:03:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 100 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:30,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:03:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:03:31,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491969783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:03:31,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:03:31,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2024-11-16 19:03:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105018805] [2024-11-16 19:03:31,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:03:31,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-16 19:03:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:03:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-16 19:03:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3217, Unknown=0, NotChecked=0, Total=3660 [2024-11-16 19:03:31,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:03:31,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 544 transitions, 3828 flow. Second operand has 61 states, 61 states have (on average 12.360655737704919) internal successors, (754), 61 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:03:31,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:03:31,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:03:31,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand