./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c --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/weaver/parallel-misc-3.wvr.c -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 b2ed7b18db6948b1f53058568aeeb46b9da6de135bdadf46ddc91e86240dfa66 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:27:08,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:27:08,960 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:27:08,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:27:08,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:27:08,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:27:08,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:27:09,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:27:09,000 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:27:09,001 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:27:09,001 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:27:09,001 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:27:09,002 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:27:09,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:27:09,003 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:27:09,003 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:27:09,003 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:27:09,004 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:27:09,004 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:27:09,004 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:27:09,005 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:27:09,005 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:27:09,006 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:27:09,006 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:27:09,006 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:27:09,007 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:27:09,007 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:27:09,007 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:27:09,008 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:27:09,008 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:27:09,008 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:27:09,008 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:27:09,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:27:09,009 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:27:09,009 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:27:09,010 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:27:09,010 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:27:09,010 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:27:09,010 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:27:09,011 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:27:09,011 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:27:09,011 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:27:09,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2ed7b18db6948b1f53058568aeeb46b9da6de135bdadf46ddc91e86240dfa66 [2024-11-16 19:27:09,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:27:09,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:27:09,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:27:09,267 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:27:09,268 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:27:09,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2024-11-16 19:27:10,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:27:10,851 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:27:10,852 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2024-11-16 19:27:10,859 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b428bdce7/fe64d2d0c351441cb32ad1584565823e/FLAGa6e348ab4 [2024-11-16 19:27:11,245 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b428bdce7/fe64d2d0c351441cb32ad1584565823e [2024-11-16 19:27:11,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:27:11,248 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:27:11,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:27:11,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:27:11,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:27:11,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,256 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cdece8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11, skipping insertion in model container [2024-11-16 19:27:11,256 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,275 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:27:11,468 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/weaver/parallel-misc-3.wvr.c[2092,2105] [2024-11-16 19:27:11,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:27:11,482 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:27:11,499 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/weaver/parallel-misc-3.wvr.c[2092,2105] [2024-11-16 19:27:11,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:27:11,516 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:27:11,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11 WrapperNode [2024-11-16 19:27:11,518 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:27:11,519 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:27:11,519 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:27:11,520 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:27:11,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,547 INFO L138 Inliner]: procedures = 18, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2024-11-16 19:27:11,548 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:27:11,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:27:11,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:27:11,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:27:11,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,570 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 19:27:11,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,574 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:27:11,579 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:27:11,579 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:27:11,579 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:27:11,580 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (1/1) ... [2024-11-16 19:27:11,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:27:11,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:11,613 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 19:27:11,615 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 19:27:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:27:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:27:11,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:27:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:27:11,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:27:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:27:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:27:11,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:27:11,655 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 19:27:11,727 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:27:11,729 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:27:11,877 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:27:11,878 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:27:12,005 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:27:12,005 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:27:12,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:27:12 BoogieIcfgContainer [2024-11-16 19:27:12,006 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:27:12,008 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:27:12,008 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:27:12,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:27:12,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:27:11" (1/3) ... [2024-11-16 19:27:12,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9fa63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:27:12, skipping insertion in model container [2024-11-16 19:27:12,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:27:11" (2/3) ... [2024-11-16 19:27:12,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9fa63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:27:12, skipping insertion in model container [2024-11-16 19:27:12,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:27:12" (3/3) ... [2024-11-16 19:27:12,014 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2024-11-16 19:27:12,029 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:27:12,029 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:27:12,029 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:27:12,077 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:27:12,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 36 transitions, 86 flow [2024-11-16 19:27:12,149 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2024-11-16 19:27:12,149 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:27:12,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 6/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-16 19:27:12,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 36 transitions, 86 flow [2024-11-16 19:27:12,156 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 33 transitions, 78 flow [2024-11-16 19:27:12,164 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:27:12,171 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;@480bb748, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:27:12,171 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:27:12,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:27:12,182 INFO L124 PetriNetUnfolderBase]: 6/32 cut-off events. [2024-11-16 19:27:12,182 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:27:12,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:12,185 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:12,185 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 19:27:12,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:12,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1535763588, now seen corresponding path program 1 times [2024-11-16 19:27:12,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:12,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994764472] [2024-11-16 19:27:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:12,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:12,377 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 19:27:12,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:12,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994764472] [2024-11-16 19:27:12,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994764472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:12,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:12,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:27:12,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702499612] [2024-11-16 19:27:12,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:12,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:27:12,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:27:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:27:12,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-11-16 19:27:12,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 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 19:27:12,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:12,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-11-16 19:27:12,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:12,517 INFO L124 PetriNetUnfolderBase]: 110/264 cut-off events. [2024-11-16 19:27:12,517 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-16 19:27:12,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 264 events. 110/264 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1241 event pairs, 45 based on Foata normal form. 35/225 useless extension candidates. Maximal degree in co-relation 399. Up to 162 conditions per place. [2024-11-16 19:27:12,526 INFO L140 encePairwiseOnDemand]: 34/36 looper letters, 16 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-11-16 19:27:12,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 106 flow [2024-11-16 19:27:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:27:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:27:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 52 transitions. [2024-11-16 19:27:12,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-11-16 19:27:12,539 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 78 flow. Second operand 2 states and 52 transitions. [2024-11-16 19:27:12,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 106 flow [2024-11-16 19:27:12,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:27:12,545 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 66 flow [2024-11-16 19:27:12,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-11-16 19:27:12,551 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2024-11-16 19:27:12,551 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 66 flow [2024-11-16 19:27:12,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 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 19:27:12,552 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:12,552 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:12,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:27:12,552 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 19:27:12,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash 491686135, now seen corresponding path program 1 times [2024-11-16 19:27:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:12,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248019018] [2024-11-16 19:27:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:12,665 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 19:27:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248019018] [2024-11-16 19:27:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248019018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:12,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:12,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:27:12,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870668729] [2024-11-16 19:27:12,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:12,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:27:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:27:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:27:12,671 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-11-16 19:27:12,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 19:27:12,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:12,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-11-16 19:27:12,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:12,771 INFO L124 PetriNetUnfolderBase]: 146/324 cut-off events. [2024-11-16 19:27:12,771 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:27:12,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 324 events. 146/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1492 event pairs, 12 based on Foata normal form. 1/267 useless extension candidates. Maximal degree in co-relation 539. Up to 185 conditions per place. [2024-11-16 19:27:12,778 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 21 selfloop transitions, 5 changer transitions 1/42 dead transitions. [2024-11-16 19:27:12,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 145 flow [2024-11-16 19:27:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:27:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:27:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-11-16 19:27:12,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7314814814814815 [2024-11-16 19:27:12,781 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 66 flow. Second operand 3 states and 79 transitions. [2024-11-16 19:27:12,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 145 flow [2024-11-16 19:27:12,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 145 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:12,785 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 99 flow [2024-11-16 19:27:12,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2024-11-16 19:27:12,787 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2024-11-16 19:27:12,787 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 99 flow [2024-11-16 19:27:12,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 19:27:12,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:12,788 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:12,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:27:12,788 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 19:27:12,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:12,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1063157984, now seen corresponding path program 1 times [2024-11-16 19:27:12,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:12,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509559742] [2024-11-16 19:27:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:12,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509559742] [2024-11-16 19:27:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509559742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:12,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:12,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:27:12,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205570952] [2024-11-16 19:27:12,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:12,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:27:12,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:12,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:27:12,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:27:12,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-11-16 19:27:12,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 19:27:12,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:12,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-11-16 19:27:12,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:13,009 INFO L124 PetriNetUnfolderBase]: 172/364 cut-off events. [2024-11-16 19:27:13,009 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-16 19:27:13,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 364 events. 172/364 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1674 event pairs, 31 based on Foata normal form. 10/322 useless extension candidates. Maximal degree in co-relation 750. Up to 173 conditions per place. [2024-11-16 19:27:13,012 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 29 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-16 19:27:13,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 190 flow [2024-11-16 19:27:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:27:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:27:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-11-16 19:27:13,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-11-16 19:27:13,015 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 99 flow. Second operand 3 states and 76 transitions. [2024-11-16 19:27:13,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 190 flow [2024-11-16 19:27:13,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 183 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:13,019 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 104 flow [2024-11-16 19:27:13,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2024-11-16 19:27:13,021 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2024-11-16 19:27:13,022 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 104 flow [2024-11-16 19:27:13,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 19:27:13,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:13,023 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:13,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:27:13,023 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 19:27:13,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:13,025 INFO L85 PathProgramCache]: Analyzing trace with hash 71947192, now seen corresponding path program 1 times [2024-11-16 19:27:13,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:13,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266252006] [2024-11-16 19:27:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:13,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:27:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266252006] [2024-11-16 19:27:13,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266252006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:13,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:13,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:27:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479392092] [2024-11-16 19:27:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:13,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:27:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:27:13,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:27:13,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-11-16 19:27:13,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 19:27:13,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:13,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-11-16 19:27:13,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:13,207 INFO L124 PetriNetUnfolderBase]: 179/394 cut-off events. [2024-11-16 19:27:13,207 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-11-16 19:27:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 394 events. 179/394 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2051 event pairs, 34 based on Foata normal form. 8/346 useless extension candidates. Maximal degree in co-relation 847. Up to 181 conditions per place. [2024-11-16 19:27:13,210 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 30 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-16 19:27:13,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 202 flow [2024-11-16 19:27:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:27:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:27:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-16 19:27:13,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-11-16 19:27:13,214 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 104 flow. Second operand 3 states and 75 transitions. [2024-11-16 19:27:13,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 202 flow [2024-11-16 19:27:13,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:13,216 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 114 flow [2024-11-16 19:27:13,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-11-16 19:27:13,217 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2024-11-16 19:27:13,218 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 114 flow [2024-11-16 19:27:13,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 19:27:13,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:13,219 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:13,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:27:13,220 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 19:27:13,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1731090393, now seen corresponding path program 1 times [2024-11-16 19:27:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:13,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785255120] [2024-11-16 19:27:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:27:13,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785255120] [2024-11-16 19:27:13,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785255120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:13,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:13,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:27:13,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101931263] [2024-11-16 19:27:13,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:13,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:13,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:13,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-11-16 19:27:13,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:13,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:13,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-11-16 19:27:13,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:13,595 INFO L124 PetriNetUnfolderBase]: 347/677 cut-off events. [2024-11-16 19:27:13,595 INFO L125 PetriNetUnfolderBase]: For 230/258 co-relation queries the response was YES. [2024-11-16 19:27:13,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 677 events. 347/677 cut-off events. For 230/258 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3214 event pairs, 56 based on Foata normal form. 14/642 useless extension candidates. Maximal degree in co-relation 1564. Up to 258 conditions per place. [2024-11-16 19:27:13,600 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 42 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-11-16 19:27:13,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 278 flow [2024-11-16 19:27:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-16 19:27:13,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-11-16 19:27:13,601 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 114 flow. Second operand 4 states and 98 transitions. [2024-11-16 19:27:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 278 flow [2024-11-16 19:27:13,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:13,604 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 144 flow [2024-11-16 19:27:13,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-11-16 19:27:13,605 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2024-11-16 19:27:13,605 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 144 flow [2024-11-16 19:27:13,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:13,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:13,606 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:13,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:27:13,606 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 19:27:13,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:13,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1609628779, now seen corresponding path program 1 times [2024-11-16 19:27:13,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:13,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531568175] [2024-11-16 19:27:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:13,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 19:27:13,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:13,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531568175] [2024-11-16 19:27:13,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531568175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:13,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:13,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:27:13,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781674249] [2024-11-16 19:27:13,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:13,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:27:13,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:27:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:27:13,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-11-16 19:27:13,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:13,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:13,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-11-16 19:27:13,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:13,772 INFO L124 PetriNetUnfolderBase]: 221/486 cut-off events. [2024-11-16 19:27:13,772 INFO L125 PetriNetUnfolderBase]: For 361/361 co-relation queries the response was YES. [2024-11-16 19:27:13,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 486 events. 221/486 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2533 event pairs, 48 based on Foata normal form. 9/464 useless extension candidates. Maximal degree in co-relation 1201. Up to 237 conditions per place. [2024-11-16 19:27:13,776 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 31 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-11-16 19:27:13,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 254 flow [2024-11-16 19:27:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:27:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:27:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-16 19:27:13,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-11-16 19:27:13,778 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 144 flow. Second operand 3 states and 74 transitions. [2024-11-16 19:27:13,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 254 flow [2024-11-16 19:27:13,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 250 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:13,783 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2024-11-16 19:27:13,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-11-16 19:27:13,784 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2024-11-16 19:27:13,785 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2024-11-16 19:27:13,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:13,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:13,785 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:13,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:27:13,786 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 19:27:13,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:13,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1530885215, now seen corresponding path program 1 times [2024-11-16 19:27:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504165149] [2024-11-16 19:27:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 19:27:13,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504165149] [2024-11-16 19:27:13,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504165149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:13,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:13,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:27:13,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880428218] [2024-11-16 19:27:13,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:13,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:13,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:13,989 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2024-11-16 19:27:13,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 19:27:13,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:13,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2024-11-16 19:27:13,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:14,131 INFO L124 PetriNetUnfolderBase]: 480/888 cut-off events. [2024-11-16 19:27:14,131 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2024-11-16 19:27:14,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 888 events. 480/888 cut-off events. For 713/713 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4932 event pairs, 122 based on Foata normal form. 19/876 useless extension candidates. Maximal degree in co-relation 2393. Up to 335 conditions per place. [2024-11-16 19:27:14,139 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 45 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2024-11-16 19:27:14,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 63 transitions, 354 flow [2024-11-16 19:27:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-16 19:27:14,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2024-11-16 19:27:14,141 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states and 95 transitions. [2024-11-16 19:27:14,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 63 transitions, 354 flow [2024-11-16 19:27:14,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-16 19:27:14,144 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 172 flow [2024-11-16 19:27:14,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-11-16 19:27:14,145 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2024-11-16 19:27:14,146 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 172 flow [2024-11-16 19:27:14,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 19:27:14,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:14,146 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:14,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:27:14,147 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:14,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash 526413076, now seen corresponding path program 1 times [2024-11-16 19:27:14,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:14,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810936917] [2024-11-16 19:27:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:27:14,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:14,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810936917] [2024-11-16 19:27:14,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810936917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:14,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669191616] [2024-11-16 19:27:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:14,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:14,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:14,370 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 19:27:14,372 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 19:27:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:14,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 19:27:14,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:27:14,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:27:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669191616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:14,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:14,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-11-16 19:27:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924540428] [2024-11-16 19:27:14,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:14,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:27:14,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:27:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:27:14,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-11-16 19:27:14,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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 19:27:14,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:14,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-11-16 19:27:14,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:15,015 INFO L124 PetriNetUnfolderBase]: 956/2239 cut-off events. [2024-11-16 19:27:15,016 INFO L125 PetriNetUnfolderBase]: For 2016/2024 co-relation queries the response was YES. [2024-11-16 19:27:15,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 2239 events. 956/2239 cut-off events. For 2016/2024 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 14851 event pairs, 145 based on Foata normal form. 1/2199 useless extension candidates. Maximal degree in co-relation 5846. Up to 658 conditions per place. [2024-11-16 19:27:15,029 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 65 selfloop transitions, 15 changer transitions 1/98 dead transitions. [2024-11-16 19:27:15,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 98 transitions, 586 flow [2024-11-16 19:27:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:27:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:27:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-16 19:27:15,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7944444444444444 [2024-11-16 19:27:15,031 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 172 flow. Second operand 5 states and 143 transitions. [2024-11-16 19:27:15,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 98 transitions, 586 flow [2024-11-16 19:27:15,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 98 transitions, 578 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:15,035 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 267 flow [2024-11-16 19:27:15,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-11-16 19:27:15,036 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2024-11-16 19:27:15,036 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 267 flow [2024-11-16 19:27:15,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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 19:27:15,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:15,036 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:15,054 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 19:27:15,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:15,238 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:15,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash 335405562, now seen corresponding path program 2 times [2024-11-16 19:27:15,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:15,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479024799] [2024-11-16 19:27:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:15,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479024799] [2024-11-16 19:27:15,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479024799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281667479] [2024-11-16 19:27:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:27:15,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:15,367 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 19:27:15,368 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 19:27:15,435 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:27:15,435 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:27:15,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 19:27:15,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:15,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:27:15,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281667479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:27:15,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:27:15,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-11-16 19:27:15,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924444351] [2024-11-16 19:27:15,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:27:15,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:27:15,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:15,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:27:15,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:27:15,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-11-16 19:27:15,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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 19:27:15,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:15,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-11-16 19:27:15,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:16,093 INFO L124 PetriNetUnfolderBase]: 1763/4165 cut-off events. [2024-11-16 19:27:16,094 INFO L125 PetriNetUnfolderBase]: For 5366/5404 co-relation queries the response was YES. [2024-11-16 19:27:16,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11843 conditions, 4165 events. 1763/4165 cut-off events. For 5366/5404 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 32803 event pairs, 165 based on Foata normal form. 7/4101 useless extension candidates. Maximal degree in co-relation 11829. Up to 1033 conditions per place. [2024-11-16 19:27:16,128 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 81 selfloop transitions, 31 changer transitions 1/130 dead transitions. [2024-11-16 19:27:16,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 130 transitions, 865 flow [2024-11-16 19:27:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:27:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:27:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-11-16 19:27:16,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2024-11-16 19:27:16,130 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 267 flow. Second operand 6 states and 174 transitions. [2024-11-16 19:27:16,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 130 transitions, 865 flow [2024-11-16 19:27:16,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 130 transitions, 809 flow, removed 28 selfloop flow, removed 0 redundant places. [2024-11-16 19:27:16,138 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 394 flow [2024-11-16 19:27:16,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=394, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2024-11-16 19:27:16,139 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2024-11-16 19:27:16,140 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 394 flow [2024-11-16 19:27:16,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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 19:27:16,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:16,144 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:16,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:27:16,348 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,SelfDestructingSolverStorable8 [2024-11-16 19:27:16,349 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:16,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 846977755, now seen corresponding path program 3 times [2024-11-16 19:27:16,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:16,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788780241] [2024-11-16 19:27:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:16,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:27:16,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:16,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788780241] [2024-11-16 19:27:16,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788780241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:16,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313752942] [2024-11-16 19:27:16,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:27:16,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:16,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:16,695 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 19:27:16,697 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 19:27:16,758 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:27:16,759 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:27:16,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 19:27:16,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 19:27:17,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:27:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 19:27:17,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313752942] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:17,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:27:17,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 10] total 18 [2024-11-16 19:27:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523238786] [2024-11-16 19:27:17,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:17,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:27:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:27:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:27:17,258 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2024-11-16 19:27:17,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 394 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 19:27:17,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:17,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2024-11-16 19:27:17,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:18,069 INFO L124 PetriNetUnfolderBase]: 3702/6929 cut-off events. [2024-11-16 19:27:18,069 INFO L125 PetriNetUnfolderBase]: For 10490/10594 co-relation queries the response was YES. [2024-11-16 19:27:18,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21324 conditions, 6929 events. 3702/6929 cut-off events. For 10490/10594 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 52113 event pairs, 841 based on Foata normal form. 124/6899 useless extension candidates. Maximal degree in co-relation 21308. Up to 2503 conditions per place. [2024-11-16 19:27:18,123 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 98 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-11-16 19:27:18,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 119 transitions, 908 flow [2024-11-16 19:27:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-11-16 19:27:18,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2024-11-16 19:27:18,125 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 394 flow. Second operand 4 states and 89 transitions. [2024-11-16 19:27:18,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 119 transitions, 908 flow [2024-11-16 19:27:18,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 119 transitions, 859 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:18,136 INFO L231 Difference]: Finished difference. Result has 62 places, 72 transitions, 415 flow [2024-11-16 19:27:18,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=415, PETRI_PLACES=62, PETRI_TRANSITIONS=72} [2024-11-16 19:27:18,137 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 28 predicate places. [2024-11-16 19:27:18,137 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 72 transitions, 415 flow [2024-11-16 19:27:18,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 19:27:18,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:18,137 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:18,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 19:27:18,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:18,338 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:18,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:18,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1553281593, now seen corresponding path program 4 times [2024-11-16 19:27:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:18,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307491446] [2024-11-16 19:27:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:18,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-16 19:27:18,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:18,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307491446] [2024-11-16 19:27:18,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307491446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:18,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:18,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:18,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383042655] [2024-11-16 19:27:18,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:18,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:18,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:18,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:18,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:18,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-16 19:27:18,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 72 transitions, 415 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 19:27:18,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:18,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-16 19:27:18,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:19,055 INFO L124 PetriNetUnfolderBase]: 2176/4864 cut-off events. [2024-11-16 19:27:19,056 INFO L125 PetriNetUnfolderBase]: For 9109/9292 co-relation queries the response was YES. [2024-11-16 19:27:19,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14753 conditions, 4864 events. 2176/4864 cut-off events. For 9109/9292 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 38928 event pairs, 695 based on Foata normal form. 332/5028 useless extension candidates. Maximal degree in co-relation 14736. Up to 2025 conditions per place. [2024-11-16 19:27:19,092 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 73 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2024-11-16 19:27:19,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 685 flow [2024-11-16 19:27:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-11-16 19:27:19,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-16 19:27:19,094 INFO L175 Difference]: Start difference. First operand has 62 places, 72 transitions, 415 flow. Second operand 4 states and 87 transitions. [2024-11-16 19:27:19,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 685 flow [2024-11-16 19:27:19,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 677 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-16 19:27:19,102 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 412 flow [2024-11-16 19:27:19,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=412, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-11-16 19:27:19,103 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2024-11-16 19:27:19,103 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 412 flow [2024-11-16 19:27:19,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 19:27:19,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:19,104 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:19,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-16 19:27:19,104 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:19,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:19,105 INFO L85 PathProgramCache]: Analyzing trace with hash 661759661, now seen corresponding path program 5 times [2024-11-16 19:27:19,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:19,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413989910] [2024-11-16 19:27:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:19,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:27:19,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:19,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413989910] [2024-11-16 19:27:19,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413989910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:19,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569502843] [2024-11-16 19:27:19,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:27:19,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:19,338 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 19:27:19,341 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 19:27:19,401 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-16 19:27:19,401 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:27:19,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 19:27:19,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 19:27:19,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 19:27:19,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569502843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:19,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 19:27:19,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-16 19:27:19,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625589675] [2024-11-16 19:27:19,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:19,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:27:19,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:27:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-16 19:27:19,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2024-11-16 19:27:19,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 19:27:19,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:19,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2024-11-16 19:27:19,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:20,535 INFO L124 PetriNetUnfolderBase]: 4466/8464 cut-off events. [2024-11-16 19:27:20,535 INFO L125 PetriNetUnfolderBase]: For 22222/22528 co-relation queries the response was YES. [2024-11-16 19:27:20,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28472 conditions, 8464 events. 4466/8464 cut-off events. For 22222/22528 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 61719 event pairs, 945 based on Foata normal form. 225/8640 useless extension candidates. Maximal degree in co-relation 28452. Up to 4101 conditions per place. [2024-11-16 19:27:20,586 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 127 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-11-16 19:27:20,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 153 transitions, 1177 flow [2024-11-16 19:27:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:27:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:27:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-11-16 19:27:20,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-16 19:27:20,588 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 412 flow. Second operand 5 states and 111 transitions. [2024-11-16 19:27:20,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 153 transitions, 1177 flow [2024-11-16 19:27:20,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 153 transitions, 1155 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-16 19:27:20,607 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 563 flow [2024-11-16 19:27:20,607 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=563, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-11-16 19:27:20,608 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 35 predicate places. [2024-11-16 19:27:20,608 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 563 flow [2024-11-16 19:27:20,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 19:27:20,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:20,608 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:20,630 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 19:27:20,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:20,809 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:20,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1414790081, now seen corresponding path program 6 times [2024-11-16 19:27:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634842639] [2024-11-16 19:27:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:27:20,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634842639] [2024-11-16 19:27:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634842639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:20,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:27:20,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:27:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128003741] [2024-11-16 19:27:20,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:20,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:27:20,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-11-16 19:27:20,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 563 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 19:27:20,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:20,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-11-16 19:27:20,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:21,147 INFO L124 PetriNetUnfolderBase]: 778/1846 cut-off events. [2024-11-16 19:27:21,149 INFO L125 PetriNetUnfolderBase]: For 6781/6883 co-relation queries the response was YES. [2024-11-16 19:27:21,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6774 conditions, 1846 events. 778/1846 cut-off events. For 6781/6883 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 12051 event pairs, 269 based on Foata normal form. 107/1906 useless extension candidates. Maximal degree in co-relation 6753. Up to 655 conditions per place. [2024-11-16 19:27:21,163 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 52 selfloop transitions, 9 changer transitions 3/80 dead transitions. [2024-11-16 19:27:21,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 80 transitions, 686 flow [2024-11-16 19:27:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-16 19:27:21,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-11-16 19:27:21,165 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 563 flow. Second operand 4 states and 91 transitions. [2024-11-16 19:27:21,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 80 transitions, 686 flow [2024-11-16 19:27:21,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 660 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:27:21,177 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 450 flow [2024-11-16 19:27:21,177 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=450, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2024-11-16 19:27:21,178 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2024-11-16 19:27:21,178 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 450 flow [2024-11-16 19:27:21,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 19:27:21,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:27:21,179 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:21,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-16 19:27:21,179 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:27:21,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:27:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1541382591, now seen corresponding path program 7 times [2024-11-16 19:27:21,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:27:21,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779217564] [2024-11-16 19:27:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:27:21,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:27:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 19:27:21,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:27:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779217564] [2024-11-16 19:27:21,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779217564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:27:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337419062] [2024-11-16 19:27:21,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:27:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:27:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:27:21,583 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 19:27:21,584 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 19:27:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:27:21,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:27:21,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:27:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 19:27:21,723 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 19:27:21,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337419062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:27:21,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 19:27:21,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-16 19:27:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588418603] [2024-11-16 19:27:21,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:27:21,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:27:21,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:27:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:27:21,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:27:21,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2024-11-16 19:27:21,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 450 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:21,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:27:21,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2024-11-16 19:27:21,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:27:21,941 INFO L124 PetriNetUnfolderBase]: 944/2166 cut-off events. [2024-11-16 19:27:21,941 INFO L125 PetriNetUnfolderBase]: For 8134/8198 co-relation queries the response was YES. [2024-11-16 19:27:21,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 2166 events. 944/2166 cut-off events. For 8134/8198 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14123 event pairs, 242 based on Foata normal form. 25/2174 useless extension candidates. Maximal degree in co-relation 8122. Up to 808 conditions per place. [2024-11-16 19:27:21,950 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 0 selfloop transitions, 0 changer transitions 91/91 dead transitions. [2024-11-16 19:27:21,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 817 flow [2024-11-16 19:27:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:27:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:27:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-16 19:27:21,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-16 19:27:21,951 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 450 flow. Second operand 4 states and 90 transitions. [2024-11-16 19:27:21,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 817 flow [2024-11-16 19:27:21,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 786 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-16 19:27:21,960 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2024-11-16 19:27:21,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2024-11-16 19:27:21,961 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 34 predicate places. [2024-11-16 19:27:21,961 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2024-11-16 19:27:21,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:27:21,964 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-11-16 19:27:21,964 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-11-16 19:27:21,964 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-16 19:27:21,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 19:27:22,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-16 19:27:22,166 INFO L407 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:27:22,169 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-16 19:27:22,169 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-16 19:27:22,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 07:27:22 BasicIcfg [2024-11-16 19:27:22,174 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-16 19:27:22,174 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-16 19:27:22,174 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-16 19:27:22,175 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-16 19:27:22,175 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:27:12" (3/4) ... [2024-11-16 19:27:22,178 INFO L143 WitnessPrinter]: Generating witness for correct program [2024-11-16 19:27:22,181 INFO L393 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-11-16 19:27:22,181 INFO L393 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-11-16 19:27:22,185 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 34 nodes and edges [2024-11-16 19:27:22,186 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-16 19:27:22,186 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-11-16 19:27:22,186 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-16 19:27:22,265 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-16 19:27:22,268 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-16 19:27:22,268 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-16 19:27:22,268 INFO L158 Benchmark]: Toolchain (without parser) took 11019.73ms. Allocated memory was 190.8MB in the beginning and 660.6MB in the end (delta: 469.8MB). Free memory was 120.0MB in the beginning and 326.1MB in the end (delta: -206.1MB). Peak memory consumption was 265.6MB. Max. memory is 16.1GB. [2024-11-16 19:27:22,268 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 117.4MB. Free memory is still 79.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 19:27:22,269 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.79ms. Allocated memory is still 190.8MB. Free memory was 120.0MB in the beginning and 106.9MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-16 19:27:22,269 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.78ms. Allocated memory is still 190.8MB. Free memory was 106.9MB in the beginning and 105.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 19:27:22,269 INFO L158 Benchmark]: Boogie Preprocessor took 30.13ms. Allocated memory is still 190.8MB. Free memory was 105.6MB in the beginning and 103.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 19:27:22,269 INFO L158 Benchmark]: IcfgBuilder took 427.34ms. Allocated memory is still 190.8MB. Free memory was 103.5MB in the beginning and 81.3MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-16 19:27:22,270 INFO L158 Benchmark]: TraceAbstraction took 10165.55ms. Allocated memory was 190.8MB in the beginning and 660.6MB in the end (delta: 469.8MB). Free memory was 80.5MB in the beginning and 330.3MB in the end (delta: -249.8MB). Peak memory consumption was 221.6MB. Max. memory is 16.1GB. [2024-11-16 19:27:22,270 INFO L158 Benchmark]: Witness Printer took 93.39ms. Allocated memory is still 660.6MB. Free memory was 330.3MB in the beginning and 326.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-16 19:27:22,271 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 117.4MB. Free memory is still 79.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.79ms. Allocated memory is still 190.8MB. Free memory was 120.0MB in the beginning and 106.9MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.78ms. Allocated memory is still 190.8MB. Free memory was 106.9MB in the beginning and 105.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.13ms. Allocated memory is still 190.8MB. Free memory was 105.6MB in the beginning and 103.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 427.34ms. Allocated memory is still 190.8MB. Free memory was 103.5MB in the beginning and 81.3MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 10165.55ms. Allocated memory was 190.8MB in the beginning and 660.6MB in the end (delta: 469.8MB). Free memory was 80.5MB in the beginning and 330.3MB in the end (delta: -249.8MB). Peak memory consumption was 221.6MB. Max. memory is 16.1GB. * Witness Printer took 93.39ms. Allocated memory is still 660.6MB. Free memory was 330.3MB in the beginning and 326.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 53 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.1s, OverallIterations: 14, TraceHistogramMax: 4, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 251 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 228 mSDsluCounter, 30 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 893 IncrementalHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 19 mSDtfsCounter, 893 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 391 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=563occurred in iteration=12, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 686 NumberOfCodeBlocks, 672 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 786 ConstructedInterpolants, 0 QuantifiedInterpolants, 2702 SizeOfPredicates, 14 NumberOfNonLiveVariables, 651 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 22 InterpolantComputations, 12 PerfectInterpolantSequences, 241/372 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-16 19:27:22,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE