./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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_unsafe-7.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 7399a2144dae504b22d3bd9a68ebd91d200de1e145cd9c7db720353ffec7d306 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:06:42,886 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:06:42,954 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:06:42,961 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:06:42,961 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:06:43,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:06:43,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:06:43,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:06:43,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:06:43,014 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:06:43,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:06:43,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:06:43,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:06:43,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:06:43,016 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:06:43,016 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:06:43,016 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:06:43,017 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:06:43,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:06:43,017 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:06:43,017 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:06:43,021 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:06:43,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:06:43,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:06:43,021 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:06:43,021 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:06:43,022 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:06:43,022 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:06:43,022 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:06:43,022 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:06:43,022 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:06:43,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:06:43,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:06:43,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:06:43,023 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:06:43,023 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:06:43,023 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:06:43,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:06:43,024 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:06:43,024 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:06:43,024 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:06:43,027 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:06:43,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7399a2144dae504b22d3bd9a68ebd91d200de1e145cd9c7db720353ffec7d306 [2024-11-10 10:06:43,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:06:43,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:06:43,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:06:43,269 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:06:43,269 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:06:43,270 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-7.i [2024-11-10 10:06:44,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:06:44,817 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:06:44,817 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-7.i [2024-11-10 10:06:44,829 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e77511bad/b70c4d0c35174460ad718613448ce444/FLAG3d6213816 [2024-11-10 10:06:45,174 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e77511bad/b70c4d0c35174460ad718613448ce444 [2024-11-10 10:06:45,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:06:45,178 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:06:45,179 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:06:45,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:06:45,185 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:06:45,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425d2ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45, skipping insertion in model container [2024-11-10 10:06:45,186 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,219 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:06:45,459 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_unsafe-7.i[30243,30256] [2024-11-10 10:06:45,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:06:45,494 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:06:45,568 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_unsafe-7.i[30243,30256] [2024-11-10 10:06:45,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:06:45,647 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:06:45,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45 WrapperNode [2024-11-10 10:06:45,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:06:45,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:06:45,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:06:45,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:06:45,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,668 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,692 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-11-10 10:06:45,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:06:45,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:06:45,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:06:45,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:06:45,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,717 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,739 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]. [2024-11-10 10:06:45,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,746 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:06:45,755 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:06:45,756 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:06:45,756 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:06:45,759 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (1/1) ... [2024-11-10 10:06:45,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:06:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:06:45,802 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) [2024-11-10 10:06:45,805 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 [2024-11-10 10:06:45,845 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-10 10:06:45,846 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-10 10:06:45,846 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-10 10:06:45,846 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-10 10:06:45,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:06:45,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:06:45,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:06:45,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:06:45,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:06:45,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:06:45,850 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:06:45,949 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:06:45,951 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:06:46,072 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:06:46,072 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:06:46,149 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:06:46,149 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:06:46,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:06:46 BoogieIcfgContainer [2024-11-10 10:06:46,150 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:06:46,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:06:46,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:06:46,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:06:46,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:06:45" (1/3) ... [2024-11-10 10:06:46,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a9e3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:06:46, skipping insertion in model container [2024-11-10 10:06:46,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:06:45" (2/3) ... [2024-11-10 10:06:46,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a9e3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:06:46, skipping insertion in model container [2024-11-10 10:06:46,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:06:46" (3/3) ... [2024-11-10 10:06:46,159 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2024-11-10 10:06:46,172 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:06:46,172 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:06:46,172 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:06:46,201 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:06:46,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 38 transitions, 84 flow [2024-11-10 10:06:46,265 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-10 10:06:46,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:06:46,269 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. [2024-11-10 10:06:46,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 38 transitions, 84 flow [2024-11-10 10:06:46,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 78 flow [2024-11-10 10:06:46,281 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:06:46,287 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;@2d4b1bf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:06:46,287 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:06:46,296 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:06:46,296 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-11-10 10:06:46,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:06:46,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:46,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:46,298 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:46,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash -850951809, now seen corresponding path program 1 times [2024-11-10 10:06:46,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154670341] [2024-11-10 10:06:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154670341] [2024-11-10 10:06:46,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154670341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:06:46,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:06:46,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:06:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701060536] [2024-11-10 10:06:46,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:06:46,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:06:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:06:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:06:46,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 38 [2024-11-10 10:06:46,513 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) [2024-11-10 10:06:46,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:46,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 38 [2024-11-10 10:06:46,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:06:46,647 INFO L124 PetriNetUnfolderBase]: 233/436 cut-off events. [2024-11-10 10:06:46,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:06:46,650 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. [2024-11-10 10:06:46,654 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 21 selfloop transitions, 0 changer transitions 1/32 dead transitions. [2024-11-10 10:06:46,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 114 flow [2024-11-10 10:06:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:06:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:06:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-10 10:06:46,665 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-10 10:06:46,667 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 78 flow. Second operand 2 states and 50 transitions. [2024-11-10 10:06:46,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 114 flow [2024-11-10 10:06:46,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 10:06:46,671 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 66 flow [2024-11-10 10:06:46,672 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} [2024-11-10 10:06:46,675 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-11-10 10:06:46,675 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 66 flow [2024-11-10 10:06:46,676 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) [2024-11-10 10:06:46,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:46,676 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:46,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:06:46,676 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:46,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1924301250, now seen corresponding path program 1 times [2024-11-10 10:06:46,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:46,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79802499] [2024-11-10 10:06:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:46,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:46,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:46,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79802499] [2024-11-10 10:06:46,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79802499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:06:46,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:06:46,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:06:46,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80788406] [2024-11-10 10:06:46,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:06:46,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:06:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:06:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:06:46,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:46,831 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) [2024-11-10 10:06:46,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:46,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:46,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:06:46,919 INFO L124 PetriNetUnfolderBase]: 265/484 cut-off events. [2024-11-10 10:06:46,919 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:06:46,921 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. [2024-11-10 10:06:46,925 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-10 10:06:46,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 146 flow [2024-11-10 10:06:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:06:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:06:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-10 10:06:46,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-11-10 10:06:46,928 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 66 flow. Second operand 3 states and 65 transitions. [2024-11-10 10:06:46,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 146 flow [2024-11-10 10:06:46,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:06:46,932 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 78 flow [2024-11-10 10:06:46,932 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} [2024-11-10 10:06:46,933 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-10 10:06:46,933 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 78 flow [2024-11-10 10:06:46,933 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) [2024-11-10 10:06:46,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:46,934 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:46,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:06:46,934 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:46,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1884553586, now seen corresponding path program 1 times [2024-11-10 10:06:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:46,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053375789] [2024-11-10 10:06:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:47,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:47,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053375789] [2024-11-10 10:06:47,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053375789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:06:47,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565535033] [2024-11-10 10:06:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:47,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:06:47,040 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) [2024-11-10 10:06:47,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:06:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:47,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-10 10:06:47,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:06:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:47,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:06:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:47,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565535033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:06:47,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:06:47,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-10 10:06:47,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478711918] [2024-11-10 10:06:47,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:06:47,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 10:06:47,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 10:06:47,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-10 10:06:47,205 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:47,206 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) [2024-11-10 10:06:47,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:47,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:47,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:06:47,345 INFO L124 PetriNetUnfolderBase]: 361/676 cut-off events. [2024-11-10 10:06:47,346 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-10 10:06:47,348 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. [2024-11-10 10:06:47,350 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 53 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-11-10 10:06:47,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 270 flow [2024-11-10 10:06:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:06:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:06:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-10 10:06:47,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-11-10 10:06:47,354 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 78 flow. Second operand 6 states and 127 transitions. [2024-11-10 10:06:47,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 270 flow [2024-11-10 10:06:47,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 67 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:06:47,357 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 112 flow [2024-11-10 10:06:47,357 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} [2024-11-10 10:06:47,358 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2024-11-10 10:06:47,358 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 112 flow [2024-11-10 10:06:47,359 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) [2024-11-10 10:06:47,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:47,359 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:47,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:06:47,563 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 [2024-11-10 10:06:47,564 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:47,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:47,565 INFO L85 PathProgramCache]: Analyzing trace with hash 291669886, now seen corresponding path program 2 times [2024-11-10 10:06:47,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:47,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32914063] [2024-11-10 10:06:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:47,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:47,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32914063] [2024-11-10 10:06:47,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32914063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:06:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610574860] [2024-11-10 10:06:47,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:06:47,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:47,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:06:47,704 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) [2024-11-10 10:06:47,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:06:47,795 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:06:47,795 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:06:47,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:06:47,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:06:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:47,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:06:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:47,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610574860] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:06:47,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:06:47,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-10 10:06:47,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449990891] [2024-11-10 10:06:47,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:06:47,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:06:47,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:47,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:06:47,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:06:47,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:47,880 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) [2024-11-10 10:06:47,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:47,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:47,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:06:48,058 INFO L124 PetriNetUnfolderBase]: 553/1060 cut-off events. [2024-11-10 10:06:48,058 INFO L125 PetriNetUnfolderBase]: For 1792/1792 co-relation queries the response was YES. [2024-11-10 10:06:48,060 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. [2024-11-10 10:06:48,064 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 101 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2024-11-10 10:06:48,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 121 transitions, 532 flow [2024-11-10 10:06:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 10:06:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 10:06:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-11-10 10:06:48,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5482456140350878 [2024-11-10 10:06:48,066 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 112 flow. Second operand 12 states and 250 transitions. [2024-11-10 10:06:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 121 transitions, 532 flow [2024-11-10 10:06:48,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 121 transitions, 524 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 10:06:48,070 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 188 flow [2024-11-10 10:06:48,070 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} [2024-11-10 10:06:48,071 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2024-11-10 10:06:48,071 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 188 flow [2024-11-10 10:06:48,071 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) [2024-11-10 10:06:48,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:48,072 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:48,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:06:48,275 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 [2024-11-10 10:06:48,276 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:48,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1326760610, now seen corresponding path program 3 times [2024-11-10 10:06:48,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:48,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229860109] [2024-11-10 10:06:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:48,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:48,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:48,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229860109] [2024-11-10 10:06:48,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229860109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:06:48,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465565377] [2024-11-10 10:06:48,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:06:48,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:48,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:06:48,519 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) [2024-11-10 10:06:48,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:06:48,600 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-10 10:06:48,601 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:06:48,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 10:06:48,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:06:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:48,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:06:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:48,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465565377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:06:48,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:06:48,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2024-11-10 10:06:48,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247896491] [2024-11-10 10:06:48,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:06:48,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:06:48,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:06:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:06:48,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:48,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 188 flow. Second operand has 19 states, 19 states have (on average 12.68421052631579) internal successors, (241), 19 states have internal predecessors, (241), 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) [2024-11-10 10:06:48,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:48,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:48,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:06:49,233 INFO L124 PetriNetUnfolderBase]: 745/1444 cut-off events. [2024-11-10 10:06:49,233 INFO L125 PetriNetUnfolderBase]: For 8112/8112 co-relation queries the response was YES. [2024-11-10 10:06:49,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3668 conditions, 1444 events. 745/1444 cut-off events. For 8112/8112 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7275 event pairs, 39 based on Foata normal form. 96/1523 useless extension candidates. Maximal degree in co-relation 3653. Up to 305 conditions per place. [2024-11-10 10:06:49,246 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 149 selfloop transitions, 17 changer transitions 0/175 dead transitions. [2024-11-10 10:06:49,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 175 transitions, 824 flow [2024-11-10 10:06:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:06:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:06:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 370 transitions. [2024-11-10 10:06:49,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5409356725146199 [2024-11-10 10:06:49,250 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 188 flow. Second operand 18 states and 370 transitions. [2024-11-10 10:06:49,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 175 transitions, 824 flow [2024-11-10 10:06:49,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 175 transitions, 776 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-10 10:06:49,260 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 248 flow [2024-11-10 10:06:49,260 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=18, PETRI_FLOW=248, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2024-11-10 10:06:49,262 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2024-11-10 10:06:49,262 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 248 flow [2024-11-10 10:06:49,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.68421052631579) internal successors, (241), 19 states have internal predecessors, (241), 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) [2024-11-10 10:06:49,263 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:49,263 INFO L204 CegarLoopForPetriNet]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:49,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 10:06:49,467 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 [2024-11-10 10:06:49,468 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:49,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1699601602, now seen corresponding path program 4 times [2024-11-10 10:06:49,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:49,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581734251] [2024-11-10 10:06:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:49,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:50,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581734251] [2024-11-10 10:06:50,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581734251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:06:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893815784] [2024-11-10 10:06:50,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:06:50,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:50,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:06:50,625 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) [2024-11-10 10:06:50,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:06:50,706 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:06:50,706 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:06:50,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-10 10:06:50,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:06:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:51,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:06:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:52,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893815784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:06:52,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:06:52,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 65 [2024-11-10 10:06:52,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967637602] [2024-11-10 10:06:52,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:06:52,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-10 10:06:52,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-10 10:06:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=3669, Unknown=0, NotChecked=0, Total=4290 [2024-11-10 10:06:52,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:52,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 248 flow. Second operand has 66 states, 66 states have (on average 12.257575757575758) internal successors, (809), 66 states have internal predecessors, (809), 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) [2024-11-10 10:06:52,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:52,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:52,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:07:13,640 INFO L124 PetriNetUnfolderBase]: 18955/37591 cut-off events. [2024-11-10 10:07:13,641 INFO L125 PetriNetUnfolderBase]: For 56724/57034 co-relation queries the response was YES. [2024-11-10 10:07:13,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89132 conditions, 37591 events. 18955/37591 cut-off events. For 56724/57034 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 331648 event pairs, 374 based on Foata normal form. 0/34687 useless extension candidates. Maximal degree in co-relation 89111. Up to 6690 conditions per place. [2024-11-10 10:07:14,061 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 643 selfloop transitions, 721 changer transitions 789/2162 dead transitions. [2024-11-10 10:07:14,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 2162 transitions, 12861 flow [2024-11-10 10:07:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2024-11-10 10:07:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2024-11-10 10:07:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 3813 transitions. [2024-11-10 10:07:14,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5093507881378573 [2024-11-10 10:07:14,072 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 248 flow. Second operand 197 states and 3813 transitions. [2024-11-10 10:07:14,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 2162 transitions, 12861 flow [2024-11-10 10:07:14,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 2162 transitions, 11151 flow, removed 494 selfloop flow, removed 11 redundant places. [2024-11-10 10:07:14,193 INFO L231 Difference]: Finished difference. Result has 341 places, 828 transitions, 6000 flow [2024-11-10 10:07:14,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=197, PETRI_FLOW=6000, PETRI_PLACES=341, PETRI_TRANSITIONS=828} [2024-11-10 10:07:14,197 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 305 predicate places. [2024-11-10 10:07:14,198 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 828 transitions, 6000 flow [2024-11-10 10:07:14,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 12.257575757575758) internal successors, (809), 66 states have internal predecessors, (809), 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) [2024-11-10 10:07:14,199 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:07:14,199 INFO L204 CegarLoopForPetriNet]: trace histogram [17, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:07:14,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 10:07:14,399 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 [2024-11-10 10:07:14,399 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:07:14,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:07:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1254949199, now seen corresponding path program 1 times [2024-11-10 10:07:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:07:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669820357] [2024-11-10 10:07:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:07:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:15,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:07:15,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669820357] [2024-11-10 10:07:15,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669820357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:07:15,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967279784] [2024-11-10 10:07:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:07:15,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:07:15,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:07:15,337 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) [2024-11-10 10:07:15,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:07:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:07:15,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-10 10:07:15,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:07:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 210 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:16,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:07:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:07:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967279784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:07:18,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:07:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2024-11-10 10:07:18,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264171914] [2024-11-10 10:07:18,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:07:18,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-10 10:07:18,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:07:18,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-10 10:07:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=4603, Unknown=0, NotChecked=0, Total=5256 [2024-11-10 10:07:18,200 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:07:18,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 828 transitions, 6000 flow. Second operand has 73 states, 73 states have (on average 12.301369863013699) internal successors, (898), 73 states have internal predecessors, (898), 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) [2024-11-10 10:07:18,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:07:18,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:07:18,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand