./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 98246e94f9eda6f7b3e0bc779400b495c6030c5dbda65475908661a0361d920c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:10:54,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:10:54,988 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:10:54,995 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:10:54,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:10:55,025 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:10:55,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:10:55,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:10:55,027 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:10:55,027 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:10:55,028 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:10:55,028 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:10:55,029 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:10:55,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:10:55,032 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:10:55,032 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:10:55,033 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:10:55,033 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:10:55,033 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:10:55,033 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:10:55,034 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:10:55,034 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:10:55,035 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:10:55,035 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:10:55,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:10:55,039 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:10:55,039 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:10:55,040 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:10:55,040 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:10:55,040 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:10:55,040 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:10:55,041 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:10:55,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:10:55,041 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:10:55,042 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:10:55,042 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:10:55,042 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:10:55,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:10:55,043 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:10:55,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:10:55,044 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:10:55,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:10:55,045 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98246e94f9eda6f7b3e0bc779400b495c6030c5dbda65475908661a0361d920c [2024-10-11 14:10:55,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:10:55,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:10:55,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:10:55,329 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:10:55,329 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:10:55,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-10-11 14:10:56,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:10:57,074 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:10:57,075 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-10-11 14:10:57,087 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4932a8bfe/dd3afc87a10741e4b91b9ad94502e858/FLAG413c75841 [2024-10-11 14:10:57,100 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4932a8bfe/dd3afc87a10741e4b91b9ad94502e858 [2024-10-11 14:10:57,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:10:57,103 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:10:57,104 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:10:57,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:10:57,112 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:10:57,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bd7e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57, skipping insertion in model container [2024-10-11 14:10:57,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,153 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:10:57,449 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30453,30466] [2024-10-11 14:10:57,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:10:57,476 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:10:57,535 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30453,30466] [2024-10-11 14:10:57,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:10:57,579 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:10:57,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57 WrapperNode [2024-10-11 14:10:57,580 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:10:57,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:10:57,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:10:57,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:10:57,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,619 INFO L138 Inliner]: procedures = 170, calls = 24, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 101 [2024-10-11 14:10:57,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:10:57,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:10:57,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:10:57,620 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:10:57,630 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,633 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,651 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:10:57,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,661 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,662 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,666 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:10:57,667 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:10:57,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:10:57,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:10:57,668 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (1/1) ... [2024-10-11 14:10:57,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:10:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:57,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:10:57,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:10:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:10:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:10:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 14:10:57,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 14:10:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:10:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:10:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:10:57,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:10:57,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:10:57,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:10:57,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:10:57,748 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:10:57,859 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:10:57,861 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:10:58,030 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:10:58,030 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:10:58,252 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:10:58,252 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:10:58,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:10:58 BoogieIcfgContainer [2024-10-11 14:10:58,252 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:10:58,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:10:58,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:10:58,260 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:10:58,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:10:57" (1/3) ... [2024-10-11 14:10:58,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7b6325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:10:58, skipping insertion in model container [2024-10-11 14:10:58,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:57" (2/3) ... [2024-10-11 14:10:58,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7b6325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:10:58, skipping insertion in model container [2024-10-11 14:10:58,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:10:58" (3/3) ... [2024-10-11 14:10:58,265 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2024-10-11 14:10:58,283 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:10:58,283 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:10:58,283 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:10:58,319 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:10:58,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 21 transitions, 46 flow [2024-10-11 14:10:58,378 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-10-11 14:10:58,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:58,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 23 events. 3/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2024-10-11 14:10:58,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 21 transitions, 46 flow [2024-10-11 14:10:58,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 21 transitions, 46 flow [2024-10-11 14:10:58,393 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:10:58,399 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;@19efbd31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:10:58,399 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:10:58,405 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:10:58,406 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2024-10-11 14:10:58,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:58,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:58,407 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 14:10:58,407 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:10:58,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1892792396, now seen corresponding path program 1 times [2024-10-11 14:10:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:58,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198807177] [2024-10-11 14:10:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:58,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198807177] [2024-10-11 14:10:58,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198807177] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:58,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:58,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:10:58,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225652310] [2024-10-11 14:10:58,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:58,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:10:58,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:10:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:10:58,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:10:58,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-10-11 14:10:58,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:58,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:10:58,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:58,749 INFO L124 PetriNetUnfolderBase]: 20/61 cut-off events. [2024-10-11 14:10:58,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:58,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 61 events. 20/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 124 event pairs, 16 based on Foata normal form. 3/57 useless extension candidates. Maximal degree in co-relation 99. Up to 51 conditions per place. [2024-10-11 14:10:58,752 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 14 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2024-10-11 14:10:58,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 76 flow [2024-10-11 14:10:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:10:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:10:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-10-11 14:10:58,763 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-10-11 14:10:58,765 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 46 flow. Second operand 3 states and 31 transitions. [2024-10-11 14:10:58,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 76 flow [2024-10-11 14:10:58,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 20 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:10:58,771 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 54 flow [2024-10-11 14:10:58,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-10-11 14:10:58,777 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2024-10-11 14:10:58,777 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 54 flow [2024-10-11 14:10:58,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-10-11 14:10:58,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:58,778 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:58,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:10:58,778 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:10:58,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash -2055429442, now seen corresponding path program 1 times [2024-10-11 14:10:58,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:58,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43035694] [2024-10-11 14:10:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:58,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:58,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:58,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43035694] [2024-10-11 14:10:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43035694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:10:58,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892946022] [2024-10-11 14:10:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:58,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:58,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:58,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:10:58,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:10:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:58,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:10:58,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:10:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:59,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:10:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892946022] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:10:59,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:10:59,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:10:59,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507348563] [2024-10-11 14:10:59,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:10:59,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:10:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:10:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:10:59,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:10:59,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2024-10-11 14:10:59,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:59,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:10:59,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:59,138 INFO L124 PetriNetUnfolderBase]: 20/64 cut-off events. [2024-10-11 14:10:59,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:59,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 64 events. 20/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 124 event pairs, 16 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 121. Up to 51 conditions per place. [2024-10-11 14:10:59,139 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 14 selfloop transitions, 5 changer transitions 0/23 dead transitions. [2024-10-11 14:10:59,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 104 flow [2024-10-11 14:10:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:10:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:10:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 46 transitions. [2024-10-11 14:10:59,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-10-11 14:10:59,144 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 54 flow. Second operand 6 states and 46 transitions. [2024-10-11 14:10:59,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 104 flow [2024-10-11 14:10:59,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 100 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:59,146 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 86 flow [2024-10-11 14:10:59,146 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2024-10-11 14:10:59,147 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-10-11 14:10:59,147 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 86 flow [2024-10-11 14:10:59,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2024-10-11 14:10:59,149 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:59,149 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-10-11 14:10:59,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:10:59,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:59,350 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:10:59,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1183726388, now seen corresponding path program 2 times [2024-10-11 14:10:59,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:59,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176073125] [2024-10-11 14:10:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:59,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:59,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:59,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176073125] [2024-10-11 14:10:59,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176073125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:10:59,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062689345] [2024-10-11 14:10:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:10:59,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:59,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:10:59,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:10:59,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:10:59,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:10:59,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:10:59,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:10:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:59,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:10:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:59,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062689345] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:10:59,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:10:59,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:10:59,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308483223] [2024-10-11 14:10:59,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:10:59,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:10:59,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:59,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:10:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:10:59,668 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-11 14:10:59,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 86 flow. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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) [2024-10-11 14:10:59,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:59,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-11 14:10:59,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:59,735 INFO L124 PetriNetUnfolderBase]: 20/66 cut-off events. [2024-10-11 14:10:59,735 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 14:10:59,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 66 events. 20/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 124 event pairs, 16 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 112. Up to 51 conditions per place. [2024-10-11 14:10:59,737 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 14 selfloop transitions, 7 changer transitions 0/25 dead transitions. [2024-10-11 14:10:59,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 25 transitions, 140 flow [2024-10-11 14:10:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:10:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:10:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 55 transitions. [2024-10-11 14:10:59,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3273809523809524 [2024-10-11 14:10:59,739 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 86 flow. Second operand 8 states and 55 transitions. [2024-10-11 14:10:59,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 25 transitions, 140 flow [2024-10-11 14:10:59,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 126 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:59,742 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 108 flow [2024-10-11 14:10:59,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2024-10-11 14:10:59,743 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2024-10-11 14:10:59,743 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 108 flow [2024-10-11 14:10:59,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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) [2024-10-11 14:10:59,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:59,744 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-10-11 14:10:59,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:10:59,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:59,949 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:10:59,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1493306612, now seen corresponding path program 3 times [2024-10-11 14:10:59,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:59,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153853807] [2024-10-11 14:10:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:59,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:10:59,990 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:00,043 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:00,045 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:00,046 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-11 14:11:00,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-11 14:11:00,047 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-11 14:11:00,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:11:00,048 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-11 14:11:00,050 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:00,050 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 14:11:00,072 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:00,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 35 transitions, 80 flow [2024-10-11 14:11:00,086 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2024-10-11 14:11:00,087 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:11:00,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 5/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 67 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-10-11 14:11:00,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 35 transitions, 80 flow [2024-10-11 14:11:00,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 35 transitions, 80 flow [2024-10-11 14:11:00,092 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:00,094 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;@19efbd31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:00,095 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:11:00,102 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:00,102 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2024-10-11 14:11:00,102 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:11:00,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:00,103 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-10-11 14:11:00,103 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:00,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -311274422, now seen corresponding path program 1 times [2024-10-11 14:11:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:00,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261891740] [2024-10-11 14:11:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:00,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261891740] [2024-10-11 14:11:00,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261891740] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:00,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:00,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:11:00,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607256819] [2024-10-11 14:11:00,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:00,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:00,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:00,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-10-11 14:11:00,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-11 14:11:00,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:00,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-10-11 14:11:00,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:00,347 INFO L124 PetriNetUnfolderBase]: 434/847 cut-off events. [2024-10-11 14:11:00,347 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-10-11 14:11:00,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 847 events. 434/847 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4006 event pairs, 376 based on Foata normal form. 54/795 useless extension candidates. Maximal degree in co-relation 963. Up to 708 conditions per place. [2024-10-11 14:11:00,358 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 24 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-10-11 14:11:00,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 128 flow [2024-10-11 14:11:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-10-11 14:11:00,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-10-11 14:11:00,363 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 80 flow. Second operand 3 states and 51 transitions. [2024-10-11 14:11:00,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 128 flow [2024-10-11 14:11:00,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:00,364 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2024-10-11 14:11:00,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-10-11 14:11:00,365 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2024-10-11 14:11:00,365 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2024-10-11 14:11:00,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-11 14:11:00,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:00,366 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:00,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:11:00,368 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:00,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1717529851, now seen corresponding path program 1 times [2024-10-11 14:11:00,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:00,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261867739] [2024-10-11 14:11:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:00,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:00,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:00,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261867739] [2024-10-11 14:11:00,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261867739] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:00,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399360913] [2024-10-11 14:11:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:00,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:00,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:00,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:11:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:00,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:11:00,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:00,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:00,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399360913] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:00,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:00,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:11:00,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542012502] [2024-10-11 14:11:00,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:00,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:11:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:11:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:11:00,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-10-11 14:11:00,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 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) [2024-10-11 14:11:00,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:00,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-10-11 14:11:00,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:00,779 INFO L124 PetriNetUnfolderBase]: 434/850 cut-off events. [2024-10-11 14:11:00,779 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-10-11 14:11:00,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 850 events. 434/850 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4006 event pairs, 376 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 1591. Up to 708 conditions per place. [2024-10-11 14:11:00,788 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 24 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-10-11 14:11:00,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 156 flow [2024-10-11 14:11:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:11:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:11:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-10-11 14:11:00,789 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-10-11 14:11:00,789 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 6 states and 74 transitions. [2024-10-11 14:11:00,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 156 flow [2024-10-11 14:11:00,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 152 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:00,791 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 118 flow [2024-10-11 14:11:00,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-10-11 14:11:00,792 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2024-10-11 14:11:00,792 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 118 flow [2024-10-11 14:11:00,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 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) [2024-10-11 14:11:00,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:00,793 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 14:11:00,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 14:11:00,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:00,995 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:00,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1280014474, now seen corresponding path program 2 times [2024-10-11 14:11:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:00,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731621561] [2024-10-11 14:11:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:00,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:01,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:01,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731621561] [2024-10-11 14:11:01,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731621561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:01,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687511980] [2024-10-11 14:11:01,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:11:01,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:01,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:01,090 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:01,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:11:01,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:11:01,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:11:01,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:11:01,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:01,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:11:01,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687511980] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:01,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:01,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:11:01,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505505675] [2024-10-11 14:11:01,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:01,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:11:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:01,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:11:01,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:11:01,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-10-11 14:11:01,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 118 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 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) [2024-10-11 14:11:01,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:01,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-10-11 14:11:01,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:01,375 INFO L124 PetriNetUnfolderBase]: 434/852 cut-off events. [2024-10-11 14:11:01,376 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-10-11 14:11:01,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1625 conditions, 852 events. 434/852 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4005 event pairs, 376 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 1582. Up to 708 conditions per place. [2024-10-11 14:11:01,382 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 24 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2024-10-11 14:11:01,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 192 flow [2024-10-11 14:11:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:11:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:11:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-10-11 14:11:01,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31785714285714284 [2024-10-11 14:11:01,384 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 118 flow. Second operand 8 states and 89 transitions. [2024-10-11 14:11:01,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 192 flow [2024-10-11 14:11:01,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 178 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:01,387 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 140 flow [2024-10-11 14:11:01,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=140, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2024-10-11 14:11:01,388 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2024-10-11 14:11:01,389 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 140 flow [2024-10-11 14:11:01,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 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) [2024-10-11 14:11:01,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:01,390 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 14:11:01,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:11:01,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-11 14:11:01,591 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:11:01,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash 406224554, now seen corresponding path program 3 times [2024-10-11 14:11:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:01,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405886897] [2024-10-11 14:11:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:01,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:01,619 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:01,649 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:01,649 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:01,649 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-11 14:11:01,650 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-11 14:11:01,650 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-11 14:11:01,650 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-11 14:11:01,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 14:11:01,652 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-11 14:11:01,652 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:01,652 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 14:11:01,678 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:01,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 49 transitions, 116 flow [2024-10-11 14:11:01,688 INFO L124 PetriNetUnfolderBase]: 7/57 cut-off events. [2024-10-11 14:11:01,689 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:11:01,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 7/57 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2024-10-11 14:11:01,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 49 transitions, 116 flow [2024-10-11 14:11:01,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 49 transitions, 116 flow [2024-10-11 14:11:01,691 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:01,691 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;@19efbd31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:01,691 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:11:01,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:01,697 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2024-10-11 14:11:01,697 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:11:01,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:01,697 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:01,697 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:01,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash -899183842, now seen corresponding path program 1 times [2024-10-11 14:11:01,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:01,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057681941] [2024-10-11 14:11:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:01,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:01,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:01,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057681941] [2024-10-11 14:11:01,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057681941] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:01,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:01,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:11:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218211078] [2024-10-11 14:11:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:01,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:01,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:01,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-10-11 14:11:01,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2024-10-11 14:11:01,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:01,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-10-11 14:11:01,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:02,486 INFO L124 PetriNetUnfolderBase]: 6347/10150 cut-off events. [2024-10-11 14:11:02,486 INFO L125 PetriNetUnfolderBase]: For 581/581 co-relation queries the response was YES. [2024-10-11 14:11:02,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19316 conditions, 10150 events. 6347/10150 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 62822 event pairs, 5560 based on Foata normal form. 738/9615 useless extension candidates. Maximal degree in co-relation 3879. Up to 8808 conditions per place. [2024-10-11 14:11:02,557 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 34 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-10-11 14:11:02,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 182 flow [2024-10-11 14:11:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-10-11 14:11:02,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-10-11 14:11:02,560 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 116 flow. Second operand 3 states and 71 transitions. [2024-10-11 14:11:02,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 182 flow [2024-10-11 14:11:02,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:02,563 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 118 flow [2024-10-11 14:11:02,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-10-11 14:11:02,564 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2024-10-11 14:11:02,565 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 118 flow [2024-10-11 14:11:02,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2024-10-11 14:11:02,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:02,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:02,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:11:02,565 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:02,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1669691968, now seen corresponding path program 1 times [2024-10-11 14:11:02,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:02,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89519280] [2024-10-11 14:11:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:02,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:02,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:02,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89519280] [2024-10-11 14:11:02,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89519280] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:02,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207423243] [2024-10-11 14:11:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:02,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:02,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:02,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:11:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:02,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:11:02,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:02,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207423243] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:02,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:02,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:11:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313583418] [2024-10-11 14:11:02,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:02,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:11:02,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:02,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:11:02,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:11:02,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-10-11 14:11:02,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 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) [2024-10-11 14:11:02,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:02,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-10-11 14:11:02,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:03,706 INFO L124 PetriNetUnfolderBase]: 6347/10153 cut-off events. [2024-10-11 14:11:03,706 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-10-11 14:11:03,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19251 conditions, 10153 events. 6347/10153 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 62819 event pairs, 5560 based on Foata normal form. 0/8880 useless extension candidates. Maximal degree in co-relation 19237. Up to 8808 conditions per place. [2024-10-11 14:11:03,777 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 34 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-10-11 14:11:03,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 208 flow [2024-10-11 14:11:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:11:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:11:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-10-11 14:11:03,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3469387755102041 [2024-10-11 14:11:03,780 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 118 flow. Second operand 6 states and 102 transitions. [2024-10-11 14:11:03,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 208 flow [2024-10-11 14:11:03,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:03,785 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 150 flow [2024-10-11 14:11:03,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-10-11 14:11:03,785 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-10-11 14:11:03,785 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 150 flow [2024-10-11 14:11:03,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 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) [2024-10-11 14:11:03,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:03,786 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:03,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:11:03,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:11:03,987 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:03,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash 435897246, now seen corresponding path program 2 times [2024-10-11 14:11:03,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:03,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977431080] [2024-10-11 14:11:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:03,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:04,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:04,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977431080] [2024-10-11 14:11:04,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977431080] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:04,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188390937] [2024-10-11 14:11:04,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:11:04,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:04,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:04,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:04,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:11:04,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:11:04,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:11:04,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 14:11:04,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 14:11:04,176 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:11:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188390937] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:04,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:11:04,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-11 14:11:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684127699] [2024-10-11 14:11:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:04,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:11:04,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 49 [2024-10-11 14:11:04,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-10-11 14:11:04,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:04,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 49 [2024-10-11 14:11:04,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:05,235 INFO L124 PetriNetUnfolderBase]: 8030/11735 cut-off events. [2024-10-11 14:11:05,236 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2024-10-11 14:11:05,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23135 conditions, 11735 events. 8030/11735 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 65083 event pairs, 2968 based on Foata normal form. 0/10322 useless extension candidates. Maximal degree in co-relation 23099. Up to 5868 conditions per place. [2024-10-11 14:11:05,334 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 61 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2024-10-11 14:11:05,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 332 flow [2024-10-11 14:11:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-10-11 14:11:05,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-10-11 14:11:05,336 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 150 flow. Second operand 3 states and 85 transitions. [2024-10-11 14:11:05,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 332 flow [2024-10-11 14:11:05,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:05,341 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 149 flow [2024-10-11 14:11:05,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-10-11 14:11:05,342 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-10-11 14:11:05,342 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 149 flow [2024-10-11 14:11:05,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-10-11 14:11:05,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:05,345 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:05,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:11:05,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:11:05,546 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:05,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1047582881, now seen corresponding path program 1 times [2024-10-11 14:11:05,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:05,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608106978] [2024-10-11 14:11:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:05,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:11:05,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:05,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608106978] [2024-10-11 14:11:05,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608106978] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:05,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196597669] [2024-10-11 14:11:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:05,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:05,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:05,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:11:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:05,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:11:05,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:11:05,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:11:05,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196597669] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:05,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:05,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:11:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374472972] [2024-10-11 14:11:05,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:05,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:11:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:11:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:11:05,867 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-10-11 14:11:05,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 149 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 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) [2024-10-11 14:11:05,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:05,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-10-11 14:11:05,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:06,714 INFO L124 PetriNetUnfolderBase]: 7325/11421 cut-off events. [2024-10-11 14:11:06,714 INFO L125 PetriNetUnfolderBase]: For 1572/1572 co-relation queries the response was YES. [2024-10-11 14:11:06,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23725 conditions, 11421 events. 7325/11421 cut-off events. For 1572/1572 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 68387 event pairs, 6208 based on Foata normal form. 2/9809 useless extension candidates. Maximal degree in co-relation 23686. Up to 10059 conditions per place. [2024-10-11 14:11:06,892 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 36 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-10-11 14:11:06,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 247 flow [2024-10-11 14:11:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:11:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:11:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-10-11 14:11:06,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3137755102040816 [2024-10-11 14:11:06,894 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 149 flow. Second operand 8 states and 123 transitions. [2024-10-11 14:11:06,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 247 flow [2024-10-11 14:11:06,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 51 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:06,898 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 182 flow [2024-10-11 14:11:06,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=182, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2024-10-11 14:11:06,899 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2024-10-11 14:11:06,899 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 182 flow [2024-10-11 14:11:06,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 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) [2024-10-11 14:11:06,900 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:06,900 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:06,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:11:07,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:07,105 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:11:07,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:07,105 INFO L85 PathProgramCache]: Analyzing trace with hash -367662305, now seen corresponding path program 2 times [2024-10-11 14:11:07,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:07,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826937888] [2024-10-11 14:11:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:07,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:07,124 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:11:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:11:07,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:11:07,141 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:11:07,142 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-11 14:11:07,142 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-11 14:11:07,142 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-11 14:11:07,142 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-11 14:11:07,142 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-11 14:11:07,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:11:07,143 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-10-11 14:11:07,143 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:11:07,143 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 14:11:07,172 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:11:07,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 63 transitions, 154 flow [2024-10-11 14:11:07,181 INFO L124 PetriNetUnfolderBase]: 9/74 cut-off events. [2024-10-11 14:11:07,181 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 14:11:07,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 74 events. 9/74 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 67. Up to 5 conditions per place. [2024-10-11 14:11:07,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 63 transitions, 154 flow [2024-10-11 14:11:07,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 63 transitions, 154 flow [2024-10-11 14:11:07,184 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:11:07,184 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;@19efbd31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:11:07,184 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:11:07,188 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:11:07,188 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2024-10-11 14:11:07,188 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-11 14:11:07,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:07,188 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:07,188 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:07,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2029982741, now seen corresponding path program 1 times [2024-10-11 14:11:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:07,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358269540] [2024-10-11 14:11:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:07,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:07,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358269540] [2024-10-11 14:11:07,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358269540] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:07,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:07,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:11:07,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542262313] [2024-10-11 14:11:07,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:07,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:07,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:07,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:07,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 63 [2024-10-11 14:11:07,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-10-11 14:11:07,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:07,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 63 [2024-10-11 14:11:07,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:14,603 INFO L124 PetriNetUnfolderBase]: 79247/113568 cut-off events. [2024-10-11 14:11:14,603 INFO L125 PetriNetUnfolderBase]: For 9189/9189 co-relation queries the response was YES. [2024-10-11 14:11:14,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218963 conditions, 113568 events. 79247/113568 cut-off events. For 9189/9189 co-relation queries the response was YES. Maximal size of possible extension queue 3059. Compared 804283 event pairs, 69712 based on Foata normal form. 9081/108686 useless extension candidates. Maximal degree in co-relation 19396. Up to 101391 conditions per place. [2024-10-11 14:11:15,326 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 44 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-10-11 14:11:15,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 238 flow [2024-10-11 14:11:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-11 14:11:15,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-10-11 14:11:15,328 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 154 flow. Second operand 3 states and 91 transitions. [2024-10-11 14:11:15,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 238 flow [2024-10-11 14:11:15,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 232 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:15,339 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 150 flow [2024-10-11 14:11:15,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-10-11 14:11:15,339 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-10-11 14:11:15,340 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 150 flow [2024-10-11 14:11:15,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-10-11 14:11:15,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:15,340 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:15,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 14:11:15,341 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:15,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash -765627188, now seen corresponding path program 1 times [2024-10-11 14:11:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:15,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937184885] [2024-10-11 14:11:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:15,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:15,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:15,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937184885] [2024-10-11 14:11:15,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937184885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:15,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35858527] [2024-10-11 14:11:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:15,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:15,395 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:15,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:11:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:15,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:11:15,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:15,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:15,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35858527] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:15,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:15,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:11:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402526168] [2024-10-11 14:11:15,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:15,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:11:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:11:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:11:15,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 63 [2024-10-11 14:11:15,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 150 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 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) [2024-10-11 14:11:15,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:15,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 63 [2024-10-11 14:11:15,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:22,866 INFO L124 PetriNetUnfolderBase]: 79247/113571 cut-off events. [2024-10-11 14:11:22,867 INFO L125 PetriNetUnfolderBase]: For 3903/3903 co-relation queries the response was YES. [2024-10-11 14:11:23,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217440 conditions, 113571 events. 79247/113571 cut-off events. For 3903/3903 co-relation queries the response was YES. Maximal size of possible extension queue 3059. Compared 804072 event pairs, 69712 based on Foata normal form. 0/99608 useless extension candidates. Maximal degree in co-relation 217425. Up to 101391 conditions per place. [2024-10-11 14:11:23,572 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 44 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-10-11 14:11:23,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 260 flow [2024-10-11 14:11:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:11:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:11:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-10-11 14:11:23,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-10-11 14:11:23,574 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 150 flow. Second operand 6 states and 130 transitions. [2024-10-11 14:11:23,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 260 flow [2024-10-11 14:11:23,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 256 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:23,594 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 182 flow [2024-10-11 14:11:23,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-10-11 14:11:23,595 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2024-10-11 14:11:23,595 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 182 flow [2024-10-11 14:11:23,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 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) [2024-10-11 14:11:23,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:23,596 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:23,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 14:11:23,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 14:11:23,801 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:23,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:23,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1102275541, now seen corresponding path program 2 times [2024-10-11 14:11:23,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:23,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135061523] [2024-10-11 14:11:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:23,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:23,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:23,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135061523] [2024-10-11 14:11:23,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135061523] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:23,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098693129] [2024-10-11 14:11:23,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:11:23,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:23,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:23,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:11:23,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:11:23,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:11:23,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:11:23,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 14:11:23,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:23,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 14:11:23,985 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:11:23,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098693129] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:23,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:11:23,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-11 14:11:23,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933453623] [2024-10-11 14:11:23,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:23,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:23,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:23,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:23,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:11:23,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 63 [2024-10-11 14:11:23,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-10-11 14:11:23,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:23,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 63 [2024-10-11 14:11:23,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:32,066 INFO L124 PetriNetUnfolderBase]: 99317/133094 cut-off events. [2024-10-11 14:11:32,066 INFO L125 PetriNetUnfolderBase]: For 3795/3795 co-relation queries the response was YES. [2024-10-11 14:11:32,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262512 conditions, 133094 events. 99317/133094 cut-off events. For 3795/3795 co-relation queries the response was YES. Maximal size of possible extension queue 2999. Compared 839613 event pairs, 37636 based on Foata normal form. 0/117098 useless extension candidates. Maximal degree in co-relation 262475. Up to 67590 conditions per place. [2024-10-11 14:11:32,777 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 81 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2024-10-11 14:11:32,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 429 flow [2024-10-11 14:11:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-10-11 14:11:32,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-10-11 14:11:32,778 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 182 flow. Second operand 3 states and 114 transitions. [2024-10-11 14:11:32,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 429 flow [2024-10-11 14:11:32,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 415 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:32,789 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 181 flow [2024-10-11 14:11:32,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-10-11 14:11:32,790 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2024-10-11 14:11:32,790 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 181 flow [2024-10-11 14:11:32,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-10-11 14:11:32,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:32,791 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:32,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:11:32,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:32,992 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:32,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:32,992 INFO L85 PathProgramCache]: Analyzing trace with hash -490519290, now seen corresponding path program 1 times [2024-10-11 14:11:32,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:32,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921007748] [2024-10-11 14:11:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:32,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-11 14:11:33,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:33,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921007748] [2024-10-11 14:11:33,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921007748] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:33,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:11:33,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:11:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91998983] [2024-10-11 14:11:33,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:33,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:33,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:33,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:33,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:11:33,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 63 [2024-10-11 14:11:33,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-11 14:11:33,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:33,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 63 [2024-10-11 14:11:33,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand