./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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/popl20-nonblocking-cntr.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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:53:36,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:53:36,444 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:53:36,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:53:36,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:53:36,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:53:36,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:53:36,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:53:36,474 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:53:36,474 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:53:36,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:53:36,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:53:36,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:53:36,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:53:36,478 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:53:36,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:53:36,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:53:36,478 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:53:36,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:53:36,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:53:36,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:53:36,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:53:36,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:53:36,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:53:36,482 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:53:36,483 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:53:36,483 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:53:36,483 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:53:36,483 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:53:36,483 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:53:36,484 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:53:36,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:53:36,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:53:36,484 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:53:36,484 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:53:36,484 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:53:36,484 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:53:36,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:53:36,485 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:53:36,485 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:53:36,485 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:53:36,486 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:53:36,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-11-19 01:53:36,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:53:36,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:53:36,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:53:36,697 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:53:36,698 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:53:36,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-19 01:53:37,882 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:53:38,013 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:53:38,014 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-19 01:53:38,021 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886b17a3a/fcd9caef659f49e58de1e920ff26e5ea/FLAG3b9c42d47 [2024-11-19 01:53:38,034 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886b17a3a/fcd9caef659f49e58de1e920ff26e5ea [2024-11-19 01:53:38,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:53:38,036 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:53:38,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:53:38,038 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:53:38,042 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:53:38,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668be2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38, skipping insertion in model container [2024-11-19 01:53:38,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,057 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:53:38,215 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/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-19 01:53:38,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:53:38,226 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:53:38,240 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/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-19 01:53:38,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:53:38,255 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:53:38,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38 WrapperNode [2024-11-19 01:53:38,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:53:38,256 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:53:38,256 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:53:38,257 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:53:38,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,266 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,278 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2024-11-19 01:53:38,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:53:38,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:53:38,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:53:38,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:53:38,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,288 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,296 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]. [2024-11-19 01:53:38,296 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,301 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,311 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,312 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:53:38,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:53:38,316 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:53:38,316 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:53:38,316 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (1/1) ... [2024-11-19 01:53:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:53:38,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:38,345 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) [2024-11-19 01:53:38,348 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 [2024-11-19 01:53:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:53:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:53:38,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:53:38,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:53:38,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:53:38,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:53:38,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 01:53:38,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 01:53:38,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:53:38,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:53:38,385 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:53:38,467 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:53:38,468 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:53:38,578 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:53:38,578 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:53:38,671 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:53:38,671 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 01:53:38,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:53:38 BoogieIcfgContainer [2024-11-19 01:53:38,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:53:38,675 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:53:38,675 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:53:38,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:53:38,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:53:38" (1/3) ... [2024-11-19 01:53:38,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223b912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:53:38, skipping insertion in model container [2024-11-19 01:53:38,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:53:38" (2/3) ... [2024-11-19 01:53:38,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223b912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:53:38, skipping insertion in model container [2024-11-19 01:53:38,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:53:38" (3/3) ... [2024-11-19 01:53:38,680 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-11-19 01:53:38,693 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:53:38,693 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:53:38,693 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:53:38,722 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:53:38,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-19 01:53:38,761 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-19 01:53:38,761 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:53:38,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-19 01:53:38,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-19 01:53:38,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-19 01:53:38,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:53:38,775 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;@76b4f61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:53:38,775 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:53:38,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:53:38,783 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-19 01:53:38,783 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:53:38,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:38,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:38,784 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:38,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:38,787 INFO L85 PathProgramCache]: Analyzing trace with hash -724561697, now seen corresponding path program 1 times [2024-11-19 01:53:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:38,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253915942] [2024-11-19 01:53:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:53:38,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:53:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:39,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253915942] [2024-11-19 01:53:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253915942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:53:39,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:53:39,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:53:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34634078] [2024-11-19 01:53:39,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:53:39,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:53:39,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:53:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:53:39,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-19 01:53:39,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2024-11-19 01:53:39,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:39,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-19 01:53:39,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:39,186 INFO L124 PetriNetUnfolderBase]: 70/138 cut-off events. [2024-11-19 01:53:39,186 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-19 01:53:39,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 138 events. 70/138 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 418 event pairs, 31 based on Foata normal form. 8/142 useless extension candidates. Maximal degree in co-relation 253. Up to 86 conditions per place. [2024-11-19 01:53:39,189 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-11-19 01:53:39,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 113 flow [2024-11-19 01:53:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:53:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:53:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-19 01:53:39,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-19 01:53:39,199 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 44 transitions. [2024-11-19 01:53:39,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 113 flow [2024-11-19 01:53:39,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:53:39,202 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-11-19 01:53:39,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-11-19 01:53:39,206 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-11-19 01:53:39,206 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-11-19 01:53:39,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2024-11-19 01:53:39,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:39,207 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:39,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:53:39,207 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:39,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash -332040435, now seen corresponding path program 1 times [2024-11-19 01:53:39,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:39,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603894068] [2024-11-19 01:53:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:53:39,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:53:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:39,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603894068] [2024-11-19 01:53:39,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603894068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:53:39,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:53:39,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:53:39,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864507562] [2024-11-19 01:53:39,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:53:39,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:53:39,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:53:39,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:53:39,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-19 01:53:39,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-11-19 01:53:39,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:39,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-19 01:53:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:39,352 INFO L124 PetriNetUnfolderBase]: 89/180 cut-off events. [2024-11-19 01:53:39,353 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-19 01:53:39,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 180 events. 89/180 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 623 event pairs, 49 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 87. Up to 124 conditions per place. [2024-11-19 01:53:39,356 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-11-19 01:53:39,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 129 flow [2024-11-19 01:53:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:53:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:53:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-19 01:53:39,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-11-19 01:53:39,358 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 43 transitions. [2024-11-19 01:53:39,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 129 flow [2024-11-19 01:53:39,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:53:39,360 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-19 01:53:39,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-19 01:53:39,361 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-19 01:53:39,362 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-19 01:53:39,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-11-19 01:53:39,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:39,363 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:39,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:53:39,363 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:39,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash -585986627, now seen corresponding path program 1 times [2024-11-19 01:53:39,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925776359] [2024-11-19 01:53:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:53:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:53:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:53:39,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:39,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925776359] [2024-11-19 01:53:39,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925776359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:39,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218533029] [2024-11-19 01:53:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:53:39,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:39,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:39,495 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) [2024-11-19 01:53:39,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:53:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:53:39,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:53:39,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:53:39,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:39,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218533029] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:39,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:53:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-11-19 01:53:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453663542] [2024-11-19 01:53:39,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:53:39,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:53:39,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:53:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 01:53:39,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-19 01:53:39,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2024-11-19 01:53:39,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:39,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-19 01:53:39,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:39,914 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2024-11-19 01:53:39,914 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-11-19 01:53:39,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 301 events. 153/301 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1135 event pairs, 23 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 236. Up to 97 conditions per place. [2024-11-19 01:53:39,918 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 35 selfloop transitions, 5 changer transitions 3/46 dead transitions. [2024-11-19 01:53:39,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 46 transitions, 238 flow [2024-11-19 01:53:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:53:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:53:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-11-19 01:53:39,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2024-11-19 01:53:39,920 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 59 transitions. [2024-11-19 01:53:39,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 46 transitions, 238 flow [2024-11-19 01:53:39,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 46 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:53:39,923 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 98 flow [2024-11-19 01:53:39,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-11-19 01:53:39,924 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2024-11-19 01:53:39,924 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 98 flow [2024-11-19 01:53:39,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2024-11-19 01:53:39,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:39,925 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:39,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:53:40,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:40,127 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:40,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:40,127 INFO L85 PathProgramCache]: Analyzing trace with hash -859289679, now seen corresponding path program 2 times [2024-11-19 01:53:40,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:40,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427223070] [2024-11-19 01:53:40,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:53:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:40,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:53:40,146 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:40,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:40,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427223070] [2024-11-19 01:53:40,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427223070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:40,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798325991] [2024-11-19 01:53:40,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:53:40,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:40,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:40,231 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) [2024-11-19 01:53:40,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:53:40,281 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:53:40,282 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:40,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:53:40,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:40,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798325991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:40,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:40,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 01:53:40,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184613251] [2024-11-19 01:53:40,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:40,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:53:40,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:53:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:53:40,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:53:40,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 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) [2024-11-19 01:53:40,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:40,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:53:40,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:40,616 INFO L124 PetriNetUnfolderBase]: 286/530 cut-off events. [2024-11-19 01:53:40,617 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-11-19 01:53:40,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 530 events. 286/530 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2168 event pairs, 42 based on Foata normal form. 18/547 useless extension candidates. Maximal degree in co-relation 507. Up to 242 conditions per place. [2024-11-19 01:53:40,622 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-11-19 01:53:40,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 335 flow [2024-11-19 01:53:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:53:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:53:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-19 01:53:40,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-19 01:53:40,625 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 98 flow. Second operand 6 states and 64 transitions. [2024-11-19 01:53:40,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 335 flow [2024-11-19 01:53:40,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 01:53:40,628 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 219 flow [2024-11-19 01:53:40,629 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-11-19 01:53:40,629 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2024-11-19 01:53:40,630 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 219 flow [2024-11-19 01:53:40,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 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) [2024-11-19 01:53:40,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:40,630 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:40,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 01:53:40,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 01:53:40,832 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:40,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1514086461, now seen corresponding path program 3 times [2024-11-19 01:53:40,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:40,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639271614] [2024-11-19 01:53:40,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:53:40,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:40,841 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:53:40,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:40,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:40,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639271614] [2024-11-19 01:53:40,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639271614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:40,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120599605] [2024-11-19 01:53:40,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:53:40,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:40,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:40,934 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) [2024-11-19 01:53:40,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:53:40,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:53:40,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:40,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 01:53:40,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:41,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:41,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120599605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:41,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:41,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-19 01:53:41,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57017125] [2024-11-19 01:53:41,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:41,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:53:41,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:53:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:53:41,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:41,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 219 flow. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 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) [2024-11-19 01:53:41,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:41,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:41,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:41,471 INFO L124 PetriNetUnfolderBase]: 487/838 cut-off events. [2024-11-19 01:53:41,471 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-11-19 01:53:41,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2874 conditions, 838 events. 487/838 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3581 event pairs, 24 based on Foata normal form. 20/858 useless extension candidates. Maximal degree in co-relation 1895. Up to 178 conditions per place. [2024-11-19 01:53:41,475 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 72 selfloop transitions, 56 changer transitions 15/144 dead transitions. [2024-11-19 01:53:41,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 144 transitions, 1111 flow [2024-11-19 01:53:41,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 01:53:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 01:53:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 146 transitions. [2024-11-19 01:53:41,478 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-11-19 01:53:41,478 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 219 flow. Second operand 16 states and 146 transitions. [2024-11-19 01:53:41,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 144 transitions, 1111 flow [2024-11-19 01:53:41,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 144 transitions, 1103 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-19 01:53:41,484 INFO L231 Difference]: Finished difference. Result has 60 places, 74 transitions, 709 flow [2024-11-19 01:53:41,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=709, PETRI_PLACES=60, PETRI_TRANSITIONS=74} [2024-11-19 01:53:41,485 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 37 predicate places. [2024-11-19 01:53:41,485 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 74 transitions, 709 flow [2024-11-19 01:53:41,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 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) [2024-11-19 01:53:41,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:41,486 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:41,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 01:53:41,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:41,690 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:41,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1453803489, now seen corresponding path program 4 times [2024-11-19 01:53:41,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:41,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645682336] [2024-11-19 01:53:41,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:53:41,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:41,701 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:53:41,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:41,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645682336] [2024-11-19 01:53:41,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645682336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462048281] [2024-11-19 01:53:41,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:53:41,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:41,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:41,761 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) [2024-11-19 01:53:41,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:53:41,797 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:53:41,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:41,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:53:41,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:41,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462048281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:41,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:41,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 01:53:41,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557131766] [2024-11-19 01:53:41,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:41,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 01:53:41,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 01:53:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:53:41,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:41,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 74 transitions, 709 flow. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 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) [2024-11-19 01:53:41,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:41,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:41,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:42,197 INFO L124 PetriNetUnfolderBase]: 881/1467 cut-off events. [2024-11-19 01:53:42,198 INFO L125 PetriNetUnfolderBase]: For 6334/6334 co-relation queries the response was YES. [2024-11-19 01:53:42,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6804 conditions, 1467 events. 881/1467 cut-off events. For 6334/6334 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6907 event pairs, 101 based on Foata normal form. 18/1485 useless extension candidates. Maximal degree in co-relation 5440. Up to 439 conditions per place. [2024-11-19 01:53:42,208 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 130 selfloop transitions, 68 changer transitions 1/200 dead transitions. [2024-11-19 01:53:42,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 200 transitions, 2104 flow [2024-11-19 01:53:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:53:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:53:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 125 transitions. [2024-11-19 01:53:42,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-11-19 01:53:42,209 INFO L175 Difference]: Start difference. First operand has 60 places, 74 transitions, 709 flow. Second operand 13 states and 125 transitions. [2024-11-19 01:53:42,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 200 transitions, 2104 flow [2024-11-19 01:53:42,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 200 transitions, 2065 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-11-19 01:53:42,223 INFO L231 Difference]: Finished difference. Result has 79 places, 125 transitions, 1486 flow [2024-11-19 01:53:42,223 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1486, PETRI_PLACES=79, PETRI_TRANSITIONS=125} [2024-11-19 01:53:42,224 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 56 predicate places. [2024-11-19 01:53:42,224 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 125 transitions, 1486 flow [2024-11-19 01:53:42,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 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) [2024-11-19 01:53:42,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:42,224 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:42,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:53:42,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:42,425 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:42,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:42,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1212668933, now seen corresponding path program 5 times [2024-11-19 01:53:42,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:42,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708380947] [2024-11-19 01:53:42,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:53:42,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:42,433 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:53:42,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:42,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:42,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708380947] [2024-11-19 01:53:42,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708380947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:42,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518799815] [2024-11-19 01:53:42,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:53:42,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:42,501 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) [2024-11-19 01:53:42,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:53:42,538 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:53:42,539 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:42,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 01:53:42,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:42,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:42,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518799815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:42,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:42,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 17 [2024-11-19 01:53:42,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227797216] [2024-11-19 01:53:42,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:42,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:53:42,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:53:42,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:53:42,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:42,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 125 transitions, 1486 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 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) [2024-11-19 01:53:42,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:42,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:42,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:43,331 INFO L124 PetriNetUnfolderBase]: 1278/2116 cut-off events. [2024-11-19 01:53:43,331 INFO L125 PetriNetUnfolderBase]: For 14746/14746 co-relation queries the response was YES. [2024-11-19 01:53:43,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11806 conditions, 2116 events. 1278/2116 cut-off events. For 14746/14746 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10549 event pairs, 35 based on Foata normal form. 63/2179 useless extension candidates. Maximal degree in co-relation 9597. Up to 395 conditions per place. [2024-11-19 01:53:43,347 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 118 selfloop transitions, 184 changer transitions 1/304 dead transitions. [2024-11-19 01:53:43,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 304 transitions, 3774 flow [2024-11-19 01:53:43,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 01:53:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-19 01:53:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 207 transitions. [2024-11-19 01:53:43,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-19 01:53:43,348 INFO L175 Difference]: Start difference. First operand has 79 places, 125 transitions, 1486 flow. Second operand 23 states and 207 transitions. [2024-11-19 01:53:43,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 304 transitions, 3774 flow [2024-11-19 01:53:43,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 304 transitions, 3618 flow, removed 78 selfloop flow, removed 0 redundant places. [2024-11-19 01:53:43,374 INFO L231 Difference]: Finished difference. Result has 117 places, 216 transitions, 3146 flow [2024-11-19 01:53:43,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3146, PETRI_PLACES=117, PETRI_TRANSITIONS=216} [2024-11-19 01:53:43,375 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 94 predicate places. [2024-11-19 01:53:43,375 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 216 transitions, 3146 flow [2024-11-19 01:53:43,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 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) [2024-11-19 01:53:43,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:43,375 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:43,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 01:53:43,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:43,576 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:43,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 943254685, now seen corresponding path program 6 times [2024-11-19 01:53:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:43,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416412911] [2024-11-19 01:53:43,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:53:43,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:43,585 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 01:53:43,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:43,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:43,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416412911] [2024-11-19 01:53:43,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416412911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:43,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865456106] [2024-11-19 01:53:43,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:53:43,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:43,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:53:43,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:53:43,705 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 01:53:43,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:43,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:53:43,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:43,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:43,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865456106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:43,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:43,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-11-19 01:53:43,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682634716] [2024-11-19 01:53:43,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:43,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:53:43,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:53:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:53:43,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:43,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 216 transitions, 3146 flow. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 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) [2024-11-19 01:53:43,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:43,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:43,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:44,476 INFO L124 PetriNetUnfolderBase]: 1953/3193 cut-off events. [2024-11-19 01:53:44,476 INFO L125 PetriNetUnfolderBase]: For 37136/37136 co-relation queries the response was YES. [2024-11-19 01:53:44,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21565 conditions, 3193 events. 1953/3193 cut-off events. For 37136/37136 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16314 event pairs, 80 based on Foata normal form. 32/3225 useless extension candidates. Maximal degree in co-relation 21235. Up to 718 conditions per place. [2024-11-19 01:53:44,500 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 199 selfloop transitions, 222 changer transitions 1/423 dead transitions. [2024-11-19 01:53:44,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 423 transitions, 6515 flow [2024-11-19 01:53:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 01:53:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 01:53:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 182 transitions. [2024-11-19 01:53:44,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2024-11-19 01:53:44,502 INFO L175 Difference]: Start difference. First operand has 117 places, 216 transitions, 3146 flow. Second operand 19 states and 182 transitions. [2024-11-19 01:53:44,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 423 transitions, 6515 flow [2024-11-19 01:53:44,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 423 transitions, 6276 flow, removed 119 selfloop flow, removed 1 redundant places. [2024-11-19 01:53:44,577 INFO L231 Difference]: Finished difference. Result has 141 places, 318 transitions, 5120 flow [2024-11-19 01:53:44,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5120, PETRI_PLACES=141, PETRI_TRANSITIONS=318} [2024-11-19 01:53:44,578 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2024-11-19 01:53:44,578 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 318 transitions, 5120 flow [2024-11-19 01:53:44,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 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) [2024-11-19 01:53:44,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:44,578 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:44,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 01:53:44,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:44,779 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:44,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 293642589, now seen corresponding path program 7 times [2024-11-19 01:53:44,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:44,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916898325] [2024-11-19 01:53:44,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:53:44,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:53:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:44,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916898325] [2024-11-19 01:53:44,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916898325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223024447] [2024-11-19 01:53:44,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:53:44,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:44,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:44,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:53:44,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:53:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:53:44,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:53:44,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:44,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:45,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223024447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:45,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:45,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-19 01:53:45,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924936512] [2024-11-19 01:53:45,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:45,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:53:45,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:53:45,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:53:45,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:45,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 318 transitions, 5120 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-11-19 01:53:45,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:45,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:45,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:46,400 INFO L124 PetriNetUnfolderBase]: 2312/3783 cut-off events. [2024-11-19 01:53:46,400 INFO L125 PetriNetUnfolderBase]: For 64648/64648 co-relation queries the response was YES. [2024-11-19 01:53:46,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28730 conditions, 3783 events. 2312/3783 cut-off events. For 64648/64648 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 19651 event pairs, 22 based on Foata normal form. 140/3923 useless extension candidates. Maximal degree in co-relation 28376. Up to 710 conditions per place. [2024-11-19 01:53:46,438 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 215 selfloop transitions, 431 changer transitions 3/650 dead transitions. [2024-11-19 01:53:46,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 650 transitions, 10729 flow [2024-11-19 01:53:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-19 01:53:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-11-19 01:53:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 405 transitions. [2024-11-19 01:53:46,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3935860058309038 [2024-11-19 01:53:46,441 INFO L175 Difference]: Start difference. First operand has 141 places, 318 transitions, 5120 flow. Second operand 49 states and 405 transitions. [2024-11-19 01:53:46,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 650 transitions, 10729 flow [2024-11-19 01:53:46,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 650 transitions, 10155 flow, removed 219 selfloop flow, removed 6 redundant places. [2024-11-19 01:53:46,599 INFO L231 Difference]: Finished difference. Result has 212 places, 495 transitions, 8999 flow [2024-11-19 01:53:46,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=8999, PETRI_PLACES=212, PETRI_TRANSITIONS=495} [2024-11-19 01:53:46,600 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 189 predicate places. [2024-11-19 01:53:46,600 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 495 transitions, 8999 flow [2024-11-19 01:53:46,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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) [2024-11-19 01:53:46,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:46,600 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:46,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 01:53:46,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:46,801 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:46,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash -643401713, now seen corresponding path program 8 times [2024-11-19 01:53:46,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:46,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711773187] [2024-11-19 01:53:46,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:53:46,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:46,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:53:46,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:46,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:46,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711773187] [2024-11-19 01:53:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711773187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:46,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321724287] [2024-11-19 01:53:46,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:53:46,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:46,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:46,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:53:46,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:53:46,935 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:53:46,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:46,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 01:53:46,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:47,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321724287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:47,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:47,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-11-19 01:53:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510225418] [2024-11-19 01:53:47,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:47,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 01:53:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 01:53:47,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2024-11-19 01:53:47,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:47,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 495 transitions, 8999 flow. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 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) [2024-11-19 01:53:47,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:47,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:47,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:48,699 INFO L124 PetriNetUnfolderBase]: 3422/5580 cut-off events. [2024-11-19 01:53:48,700 INFO L125 PetriNetUnfolderBase]: For 184929/184929 co-relation queries the response was YES. [2024-11-19 01:53:48,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52919 conditions, 5580 events. 3422/5580 cut-off events. For 184929/184929 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 31469 event pairs, 17 based on Foata normal form. 108/5688 useless extension candidates. Maximal degree in co-relation 52068. Up to 1127 conditions per place. [2024-11-19 01:53:48,767 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 314 selfloop transitions, 669 changer transitions 8/992 dead transitions. [2024-11-19 01:53:48,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 992 transitions, 20034 flow [2024-11-19 01:53:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-19 01:53:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-19 01:53:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 328 transitions. [2024-11-19 01:53:48,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4004884004884005 [2024-11-19 01:53:48,773 INFO L175 Difference]: Start difference. First operand has 212 places, 495 transitions, 8999 flow. Second operand 39 states and 328 transitions. [2024-11-19 01:53:48,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 992 transitions, 20034 flow [2024-11-19 01:53:49,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 992 transitions, 19067 flow, removed 411 selfloop flow, removed 11 redundant places. [2024-11-19 01:53:49,358 INFO L231 Difference]: Finished difference. Result has 256 places, 805 transitions, 16804 flow [2024-11-19 01:53:49,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8275, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16804, PETRI_PLACES=256, PETRI_TRANSITIONS=805} [2024-11-19 01:53:49,361 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 233 predicate places. [2024-11-19 01:53:49,361 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 805 transitions, 16804 flow [2024-11-19 01:53:49,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 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) [2024-11-19 01:53:49,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:49,361 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:49,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 01:53:49,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 01:53:49,562 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:49,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:49,563 INFO L85 PathProgramCache]: Analyzing trace with hash 742700219, now seen corresponding path program 9 times [2024-11-19 01:53:49,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:49,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684443133] [2024-11-19 01:53:49,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:53:49,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:49,572 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:53:49,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:49,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:49,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684443133] [2024-11-19 01:53:49,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684443133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:49,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232447034] [2024-11-19 01:53:49,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:53:49,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:49,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:49,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:53:49,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:53:49,688 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:53:49,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:49,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:53:49,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:49,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:49,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232447034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:49,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:49,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-19 01:53:49,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952032081] [2024-11-19 01:53:49,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:49,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 01:53:49,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 01:53:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2024-11-19 01:53:49,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:49,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 805 transitions, 16804 flow. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:53:49,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:49,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:49,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:51,923 INFO L124 PetriNetUnfolderBase]: 3664/6020 cut-off events. [2024-11-19 01:53:51,923 INFO L125 PetriNetUnfolderBase]: For 248381/248381 co-relation queries the response was YES. [2024-11-19 01:53:51,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62797 conditions, 6020 events. 3664/6020 cut-off events. For 248381/248381 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 35002 event pairs, 70 based on Foata normal form. 72/6092 useless extension candidates. Maximal degree in co-relation 61935. Up to 1181 conditions per place. [2024-11-19 01:53:52,002 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 294 selfloop transitions, 864 changer transitions 3/1162 dead transitions. [2024-11-19 01:53:52,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1162 transitions, 26173 flow [2024-11-19 01:53:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-19 01:53:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-19 01:53:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 340 transitions. [2024-11-19 01:53:52,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-11-19 01:53:52,005 INFO L175 Difference]: Start difference. First operand has 256 places, 805 transitions, 16804 flow. Second operand 40 states and 340 transitions. [2024-11-19 01:53:52,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1162 transitions, 26173 flow [2024-11-19 01:53:53,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1162 transitions, 24920 flow, removed 593 selfloop flow, removed 12 redundant places. [2024-11-19 01:53:53,099 INFO L231 Difference]: Finished difference. Result has 299 places, 1003 transitions, 23092 flow [2024-11-19 01:53:53,099 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=16224, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=23092, PETRI_PLACES=299, PETRI_TRANSITIONS=1003} [2024-11-19 01:53:53,100 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 276 predicate places. [2024-11-19 01:53:53,100 INFO L471 AbstractCegarLoop]: Abstraction has has 299 places, 1003 transitions, 23092 flow [2024-11-19 01:53:53,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:53:53,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:53,100 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:53,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 01:53:53,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:53,301 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:53,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash 958236087, now seen corresponding path program 10 times [2024-11-19 01:53:53,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:53,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31526338] [2024-11-19 01:53:53,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:53:53,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:53,306 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:53:53,306 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:53,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:53,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31526338] [2024-11-19 01:53:53,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31526338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:53,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690106802] [2024-11-19 01:53:53,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:53:53,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:53,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:53:53,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:53:53,382 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:53:53,382 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:53,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:53:53,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:53,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690106802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:53,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 01:53:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498913605] [2024-11-19 01:53:53,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:53,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 01:53:53,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 01:53:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:53:53,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:53,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 1003 transitions, 23092 flow. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 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) [2024-11-19 01:53:53,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:53,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:53,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:53:55,693 INFO L124 PetriNetUnfolderBase]: 4116/6744 cut-off events. [2024-11-19 01:53:55,694 INFO L125 PetriNetUnfolderBase]: For 329269/329269 co-relation queries the response was YES. [2024-11-19 01:53:55,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74739 conditions, 6744 events. 4116/6744 cut-off events. For 329269/329269 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40439 event pairs, 1240 based on Foata normal form. 24/6768 useless extension candidates. Maximal degree in co-relation 73914. Up to 5619 conditions per place. [2024-11-19 01:53:55,902 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1058 selfloop transitions, 119 changer transitions 2/1180 dead transitions. [2024-11-19 01:53:55,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1180 transitions, 29229 flow [2024-11-19 01:53:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:53:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:53:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 127 transitions. [2024-11-19 01:53:55,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4652014652014652 [2024-11-19 01:53:55,904 INFO L175 Difference]: Start difference. First operand has 299 places, 1003 transitions, 23092 flow. Second operand 13 states and 127 transitions. [2024-11-19 01:53:55,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1180 transitions, 29229 flow [2024-11-19 01:53:57,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1180 transitions, 27864 flow, removed 386 selfloop flow, removed 11 redundant places. [2024-11-19 01:53:57,865 INFO L231 Difference]: Finished difference. Result has 308 places, 1079 transitions, 24004 flow [2024-11-19 01:53:57,866 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21830, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=927, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=24004, PETRI_PLACES=308, PETRI_TRANSITIONS=1079} [2024-11-19 01:53:57,866 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 285 predicate places. [2024-11-19 01:53:57,866 INFO L471 AbstractCegarLoop]: Abstraction has has 308 places, 1079 transitions, 24004 flow [2024-11-19 01:53:57,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 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) [2024-11-19 01:53:57,867 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:53:57,867 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:53:57,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 01:53:58,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 01:53:58,067 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:53:58,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:53:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1928133859, now seen corresponding path program 11 times [2024-11-19 01:53:58,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:53:58,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969829592] [2024-11-19 01:53:58,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:53:58,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:53:58,073 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:53:58,073 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:58,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:53:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969829592] [2024-11-19 01:53:58,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969829592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:53:58,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453061838] [2024-11-19 01:53:58,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:53:58,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:53:58,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:53:58,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:53:58,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 01:53:58,160 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:53:58,160 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:53:58,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 01:53:58,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:53:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:58,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:53:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:53:58,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453061838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:53:58,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:53:58,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2024-11-19 01:53:58,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644082893] [2024-11-19 01:53:58,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:53:58,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 01:53:58,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:53:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 01:53:58,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-11-19 01:53:58,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:53:58,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 1079 transitions, 24004 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:53:58,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:53:58,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:53:58,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:54:00,877 INFO L124 PetriNetUnfolderBase]: 4347/7137 cut-off events. [2024-11-19 01:54:00,877 INFO L125 PetriNetUnfolderBase]: For 362087/362087 co-relation queries the response was YES. [2024-11-19 01:54:00,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79355 conditions, 7137 events. 4347/7137 cut-off events. For 362087/362087 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43324 event pairs, 764 based on Foata normal form. 94/7231 useless extension candidates. Maximal degree in co-relation 77855. Up to 3505 conditions per place. [2024-11-19 01:54:01,084 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 692 selfloop transitions, 589 changer transitions 2/1284 dead transitions. [2024-11-19 01:54:01,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1284 transitions, 30861 flow [2024-11-19 01:54:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 01:54:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-19 01:54:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 208 transitions. [2024-11-19 01:54:01,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4306418219461698 [2024-11-19 01:54:01,085 INFO L175 Difference]: Start difference. First operand has 308 places, 1079 transitions, 24004 flow. Second operand 23 states and 208 transitions. [2024-11-19 01:54:01,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1284 transitions, 30861 flow [2024-11-19 01:54:03,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1284 transitions, 30331 flow, removed 243 selfloop flow, removed 1 redundant places. [2024-11-19 01:54:03,329 INFO L231 Difference]: Finished difference. Result has 346 places, 1146 transitions, 27688 flow [2024-11-19 01:54:03,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=23551, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1075, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=27688, PETRI_PLACES=346, PETRI_TRANSITIONS=1146} [2024-11-19 01:54:03,330 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 323 predicate places. [2024-11-19 01:54:03,330 INFO L471 AbstractCegarLoop]: Abstraction has has 346 places, 1146 transitions, 27688 flow [2024-11-19 01:54:03,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:54:03,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:54:03,331 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:54:03,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 01:54:03,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 01:54:03,531 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:54:03,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:54:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash 872485175, now seen corresponding path program 12 times [2024-11-19 01:54:03,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:54:03,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306198476] [2024-11-19 01:54:03,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:54:03,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:54:03,537 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:54:03,538 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:54:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:03,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:54:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306198476] [2024-11-19 01:54:03,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306198476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:54:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822842154] [2024-11-19 01:54:03,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:54:03,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:54:03,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:54:03,622 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:54:03,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 01:54:03,667 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:54:03,667 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:54:03,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:54:03,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:54:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:03,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:54:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:54:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822842154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:54:03,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:54:03,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-19 01:54:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126439640] [2024-11-19 01:54:03,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:54:03,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:54:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:54:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:54:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:54:03,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:54:03,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1146 transitions, 27688 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 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) [2024-11-19 01:54:03,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:54:03,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:54:03,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:54:06,933 INFO L124 PetriNetUnfolderBase]: 4763/7851 cut-off events. [2024-11-19 01:54:06,933 INFO L125 PetriNetUnfolderBase]: For 471099/471099 co-relation queries the response was YES. [2024-11-19 01:54:06,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93753 conditions, 7851 events. 4763/7851 cut-off events. For 471099/471099 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 48831 event pairs, 89 based on Foata normal form. 112/7963 useless extension candidates. Maximal degree in co-relation 93276. Up to 3107 conditions per place. [2024-11-19 01:54:07,049 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 690 selfloop transitions, 678 changer transitions 1/1370 dead transitions. [2024-11-19 01:54:07,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1370 transitions, 35293 flow [2024-11-19 01:54:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 01:54:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-19 01:54:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 216 transitions. [2024-11-19 01:54:07,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4114285714285714 [2024-11-19 01:54:07,050 INFO L175 Difference]: Start difference. First operand has 346 places, 1146 transitions, 27688 flow. Second operand 25 states and 216 transitions. [2024-11-19 01:54:07,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1370 transitions, 35293 flow [2024-11-19 01:54:09,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1370 transitions, 34715 flow, removed 259 selfloop flow, removed 4 redundant places. [2024-11-19 01:54:09,969 INFO L231 Difference]: Finished difference. Result has 379 places, 1224 transitions, 31965 flow [2024-11-19 01:54:09,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27144, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=31965, PETRI_PLACES=379, PETRI_TRANSITIONS=1224} [2024-11-19 01:54:09,971 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 356 predicate places. [2024-11-19 01:54:09,971 INFO L471 AbstractCegarLoop]: Abstraction has has 379 places, 1224 transitions, 31965 flow [2024-11-19 01:54:09,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 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) [2024-11-19 01:54:09,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:54:09,971 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:54:09,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 01:54:10,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 01:54:10,172 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:54:10,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:54:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1720925345, now seen corresponding path program 13 times [2024-11-19 01:54:10,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:54:10,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612227800] [2024-11-19 01:54:10,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:54:10,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:54:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:54:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:10,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:54:10,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612227800] [2024-11-19 01:54:10,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612227800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:54:10,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296616604] [2024-11-19 01:54:10,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:54:10,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:54:10,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:54:10,244 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:54:10,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 01:54:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:54:10,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:54:10,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:54:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:10,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:54:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:10,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296616604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:54:10,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:54:10,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-19 01:54:10,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306753427] [2024-11-19 01:54:10,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:54:10,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:54:10,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:54:10,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:54:10,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:54:10,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:54:10,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1224 transitions, 31965 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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) [2024-11-19 01:54:10,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:54:10,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:54:10,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:54:13,806 INFO L124 PetriNetUnfolderBase]: 5106/8360 cut-off events. [2024-11-19 01:54:13,807 INFO L125 PetriNetUnfolderBase]: For 591776/591776 co-relation queries the response was YES. [2024-11-19 01:54:13,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106326 conditions, 8360 events. 5106/8360 cut-off events. For 591776/591776 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 52136 event pairs, 278 based on Foata normal form. 22/8382 useless extension candidates. Maximal degree in co-relation 105808. Up to 6639 conditions per place. [2024-11-19 01:54:13,942 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1149 selfloop transitions, 220 changer transitions 4/1374 dead transitions. [2024-11-19 01:54:13,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1374 transitions, 38699 flow [2024-11-19 01:54:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 01:54:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 01:54:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 140 transitions. [2024-11-19 01:54:13,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-19 01:54:13,943 INFO L175 Difference]: Start difference. First operand has 379 places, 1224 transitions, 31965 flow. Second operand 16 states and 140 transitions. [2024-11-19 01:54:13,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1374 transitions, 38699 flow [2024-11-19 01:54:17,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1374 transitions, 38092 flow, removed 267 selfloop flow, removed 12 redundant places. [2024-11-19 01:54:17,279 INFO L231 Difference]: Finished difference. Result has 387 places, 1296 transitions, 34397 flow [2024-11-19 01:54:17,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=31473, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=34397, PETRI_PLACES=387, PETRI_TRANSITIONS=1296} [2024-11-19 01:54:17,281 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 364 predicate places. [2024-11-19 01:54:17,281 INFO L471 AbstractCegarLoop]: Abstraction has has 387 places, 1296 transitions, 34397 flow [2024-11-19 01:54:17,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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) [2024-11-19 01:54:17,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:54:17,282 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:54:17,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 01:54:17,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 01:54:17,483 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:54:17,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:54:17,483 INFO L85 PathProgramCache]: Analyzing trace with hash 661513305, now seen corresponding path program 14 times [2024-11-19 01:54:17,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:54:17,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460653705] [2024-11-19 01:54:17,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:54:17,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:54:17,491 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:54:17,492 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:54:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:54:17,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:54:17,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460653705] [2024-11-19 01:54:17,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460653705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:54:17,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985009729] [2024-11-19 01:54:17,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:54:17,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:54:17,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:54:17,538 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:54:17,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 01:54:17,573 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:54:17,573 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:54:17,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 01:54:17,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:54:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:54:17,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:54:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:17,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985009729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:54:17,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:54:17,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 8 [2024-11-19 01:54:17,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706727029] [2024-11-19 01:54:17,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:54:17,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:54:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:54:17,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:54:17,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:54:17,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-19 01:54:17,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1296 transitions, 34397 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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) [2024-11-19 01:54:17,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:54:17,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-19 01:54:17,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:54:22,458 INFO L124 PetriNetUnfolderBase]: 6952/12309 cut-off events. [2024-11-19 01:54:22,458 INFO L125 PetriNetUnfolderBase]: For 821109/821586 co-relation queries the response was YES. [2024-11-19 01:54:22,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157193 conditions, 12309 events. 6952/12309 cut-off events. For 821109/821586 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 91643 event pairs, 324 based on Foata normal form. 175/12354 useless extension candidates. Maximal degree in co-relation 156108. Up to 3597 conditions per place. [2024-11-19 01:54:22,662 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 1364 selfloop transitions, 519 changer transitions 149/2308 dead transitions. [2024-11-19 01:54:22,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2308 transitions, 65076 flow [2024-11-19 01:54:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:54:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:54:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-19 01:54:22,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7238095238095238 [2024-11-19 01:54:22,664 INFO L175 Difference]: Start difference. First operand has 387 places, 1296 transitions, 34397 flow. Second operand 5 states and 76 transitions. [2024-11-19 01:54:22,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2308 transitions, 65076 flow [2024-11-19 01:54:29,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 2308 transitions, 64339 flow, removed 282 selfloop flow, removed 9 redundant places. [2024-11-19 01:54:29,713 INFO L231 Difference]: Finished difference. Result has 383 places, 1641 transitions, 47129 flow [2024-11-19 01:54:29,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=34038, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=47129, PETRI_PLACES=383, PETRI_TRANSITIONS=1641} [2024-11-19 01:54:29,714 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 360 predicate places. [2024-11-19 01:54:29,714 INFO L471 AbstractCegarLoop]: Abstraction has has 383 places, 1641 transitions, 47129 flow [2024-11-19 01:54:29,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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) [2024-11-19 01:54:29,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:54:29,715 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:54:29,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 01:54:29,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:54:29,919 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:54:29,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:54:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash 156683103, now seen corresponding path program 15 times [2024-11-19 01:54:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:54:29,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151989034] [2024-11-19 01:54:29,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:54:29,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:54:29,926 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-19 01:54:29,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:54:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:54:29,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:54:29,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151989034] [2024-11-19 01:54:29,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151989034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:54:29,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117734781] [2024-11-19 01:54:29,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:54:29,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:54:29,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:54:29,970 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:54:29,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 01:54:30,008 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-19 01:54:30,008 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:54:30,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:54:30,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:54:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:54:30,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:54:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:54:30,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117734781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:54:30,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:54:30,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-19 01:54:30,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188138759] [2024-11-19 01:54:30,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:54:30,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:54:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:54:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:54:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:54:30,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-19 01:54:30,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1641 transitions, 47129 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 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) [2024-11-19 01:54:30,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:54:30,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-19 01:54:30,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:54:36,146 INFO L124 PetriNetUnfolderBase]: 7937/13495 cut-off events. [2024-11-19 01:54:36,146 INFO L125 PetriNetUnfolderBase]: For 860780/860975 co-relation queries the response was YES. [2024-11-19 01:54:36,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175745 conditions, 13495 events. 7937/13495 cut-off events. For 860780/860975 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 95849 event pairs, 328 based on Foata normal form. 108/13553 useless extension candidates. Maximal degree in co-relation 174579. Up to 5314 conditions per place. [2024-11-19 01:54:36,334 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 929 selfloop transitions, 933 changer transitions 125/2059 dead transitions. [2024-11-19 01:54:36,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2059 transitions, 61104 flow [2024-11-19 01:54:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:54:36,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:54:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-11-19 01:54:36,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-19 01:54:36,335 INFO L175 Difference]: Start difference. First operand has 383 places, 1641 transitions, 47129 flow. Second operand 7 states and 91 transitions. [2024-11-19 01:54:36,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2059 transitions, 61104 flow [2024-11-19 01:54:44,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 2059 transitions, 60681 flow, removed 138 selfloop flow, removed 1 redundant places. [2024-11-19 01:54:44,114 INFO L231 Difference]: Finished difference. Result has 394 places, 1749 transitions, 53703 flow [2024-11-19 01:54:44,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=46732, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=53703, PETRI_PLACES=394, PETRI_TRANSITIONS=1749} [2024-11-19 01:54:44,116 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 371 predicate places. [2024-11-19 01:54:44,116 INFO L471 AbstractCegarLoop]: Abstraction has has 394 places, 1749 transitions, 53703 flow [2024-11-19 01:54:44,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 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) [2024-11-19 01:54:44,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:54:44,116 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:54:44,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 01:54:44,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 01:54:44,317 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:54:44,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:54:44,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1287645775, now seen corresponding path program 16 times [2024-11-19 01:54:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:54:44,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742768838] [2024-11-19 01:54:44,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:54:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:54:44,322 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:54:44,322 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:54:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:44,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:54:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742768838] [2024-11-19 01:54:44,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742768838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:54:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373875681] [2024-11-19 01:54:44,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:54:44,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:54:44,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:54:44,381 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:54:44,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 01:54:44,419 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:54:44,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:54:44,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:54:44,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:54:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:44,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:54:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:54:44,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373875681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:54:44,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:54:44,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-19 01:54:44,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670474832] [2024-11-19 01:54:44,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:54:44,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 01:54:44,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:54:44,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 01:54:44,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-19 01:54:44,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:54:44,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1749 transitions, 53703 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 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) [2024-11-19 01:54:44,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:54:44,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:54:44,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:54:54,568 INFO L124 PetriNetUnfolderBase]: 12326/19916 cut-off events. [2024-11-19 01:54:54,568 INFO L125 PetriNetUnfolderBase]: For 1517137/1517137 co-relation queries the response was YES. [2024-11-19 01:54:54,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275898 conditions, 19916 events. 12326/19916 cut-off events. For 1517137/1517137 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 138125 event pairs, 668 based on Foata normal form. 76/19992 useless extension candidates. Maximal degree in co-relation 274521. Up to 13521 conditions per place. [2024-11-19 01:54:54,840 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1873 selfloop transitions, 843 changer transitions 4/2721 dead transitions. [2024-11-19 01:54:54,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 2721 transitions, 87794 flow [2024-11-19 01:54:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-19 01:54:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-19 01:54:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 236 transitions. [2024-11-19 01:54:54,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-11-19 01:54:54,841 INFO L175 Difference]: Start difference. First operand has 394 places, 1749 transitions, 53703 flow. Second operand 28 states and 236 transitions. [2024-11-19 01:54:54,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 2721 transitions, 87794 flow [2024-11-19 01:55:09,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 2721 transitions, 86646 flow, removed 212 selfloop flow, removed 3 redundant places. [2024-11-19 01:55:09,768 INFO L231 Difference]: Finished difference. Result has 440 places, 2369 transitions, 75549 flow [2024-11-19 01:55:09,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52912, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=75549, PETRI_PLACES=440, PETRI_TRANSITIONS=2369} [2024-11-19 01:55:09,770 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 417 predicate places. [2024-11-19 01:55:09,770 INFO L471 AbstractCegarLoop]: Abstraction has has 440 places, 2369 transitions, 75549 flow [2024-11-19 01:55:09,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 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) [2024-11-19 01:55:09,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:09,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:09,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 01:55:09,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 01:55:09,971 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:09,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1822663781, now seen corresponding path program 17 times [2024-11-19 01:55:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:09,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476786131] [2024-11-19 01:55:09,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:55:09,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:09,976 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:55:09,976 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:10,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:10,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476786131] [2024-11-19 01:55:10,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476786131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:10,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067334995] [2024-11-19 01:55:10,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:55:10,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:10,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:10,050 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:55:10,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 01:55:10,088 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:55:10,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:10,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:55:10,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:10,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067334995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:10,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:10,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-11-19 01:55:10,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136816907] [2024-11-19 01:55:10,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:10,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:55:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:10,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:55:10,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:55:10,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-19 01:55:10,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 2369 transitions, 75549 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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) [2024-11-19 01:55:10,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:10,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-19 01:55:10,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand