./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:40:01,885 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:40:01,960 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:40:01,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:40:01,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:40:01,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:40:02,001 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:40:02,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:40:02,002 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:40:02,003 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:40:02,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:40:02,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:40:02,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:40:02,005 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:40:02,005 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:40:02,007 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:40:02,008 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:40:02,008 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:40:02,008 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:40:02,008 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:40:02,009 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:40:02,009 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:40:02,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:40:02,013 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:40:02,013 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:40:02,014 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:40:02,014 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:40:02,014 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:40:02,014 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:40:02,014 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:40:02,015 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:40:02,015 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:40:02,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:40:02,015 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:40:02,015 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:40:02,016 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:40:02,016 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:40:02,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:40:02,017 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:40:02,017 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:40:02,018 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:40:02,018 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:40:02,019 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2024-11-20 09:40:02,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:40:02,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:40:02,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:40:02,354 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:40:02,358 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:40:02,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-11-20 09:40:03,865 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:40:04,058 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:40:04,062 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-11-20 09:40:04,072 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b4ca4674/f851540a244f420cba1fe5f7bee4b853/FLAGbed44a04a [2024-11-20 09:40:04,087 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b4ca4674/f851540a244f420cba1fe5f7bee4b853 [2024-11-20 09:40:04,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:40:04,091 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:40:04,092 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:40:04,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:40:04,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:40:04,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e50170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04, skipping insertion in model container [2024-11-20 09:40:04,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,128 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:40:04,312 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-11-20 09:40:04,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:40:04,325 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:40:04,347 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-11-20 09:40:04,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:40:04,368 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:40:04,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04 WrapperNode [2024-11-20 09:40:04,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:40:04,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:40:04,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:40:04,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:40:04,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,429 INFO L138 Inliner]: procedures = 20, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 48 [2024-11-20 09:40:04,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:40:04,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:40:04,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:40:04,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:40:04,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,445 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,463 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-20 09:40:04,463 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,471 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:40:04,482 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:40:04,482 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:40:04,482 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:40:04,483 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (1/1) ... [2024-11-20 09:40:04,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:40:04,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:04,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 09:40:04,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 09:40:04,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:40:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:40:04,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:40:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:40:04,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:40:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:40:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 09:40:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 09:40:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:40:04,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:40:04,562 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:40:04,626 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:40:04,628 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:40:04,761 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:40:04,762 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:40:04,875 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:40:04,875 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 09:40:04,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:40:04 BoogieIcfgContainer [2024-11-20 09:40:04,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:40:04,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:40:04,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:40:04,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:40:04,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:40:04" (1/3) ... [2024-11-20 09:40:04,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c76aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:40:04, skipping insertion in model container [2024-11-20 09:40:04,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:04" (2/3) ... [2024-11-20 09:40:04,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c76aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:40:04, skipping insertion in model container [2024-11-20 09:40:04,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:40:04" (3/3) ... [2024-11-20 09:40:04,884 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2024-11-20 09:40:04,897 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:40:04,898 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:40:04,898 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:40:04,948 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:40:04,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 25 transitions, 64 flow [2024-11-20 09:40:05,000 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2024-11-20 09:40:05,000 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:40:05,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 2/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-11-20 09:40:05,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 25 transitions, 64 flow [2024-11-20 09:40:05,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 22 transitions, 56 flow [2024-11-20 09:40:05,012 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:40:05,017 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;@3dcaaffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:40:05,017 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:40:05,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:40:05,029 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-11-20 09:40:05,029 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:40:05,029 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:05,030 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:05,030 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:05,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:05,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1256207023, now seen corresponding path program 1 times [2024-11-20 09:40:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:05,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699844502] [2024-11-20 09:40:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:05,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:05,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699844502] [2024-11-20 09:40:05,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699844502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:05,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:05,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:40:05,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308721432] [2024-11-20 09:40:05,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:05,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:40:05,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:40:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:40:05,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2024-11-20 09:40:05,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2024-11-20 09:40:05,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:05,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2024-11-20 09:40:05,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:05,665 INFO L124 PetriNetUnfolderBase]: 104/206 cut-off events. [2024-11-20 09:40:05,666 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-20 09:40:05,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 206 events. 104/206 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 784 event pairs, 8 based on Foata normal form. 12/213 useless extension candidates. Maximal degree in co-relation 366. Up to 117 conditions per place. [2024-11-20 09:40:05,670 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 29 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2024-11-20 09:40:05,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 42 transitions, 175 flow [2024-11-20 09:40:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:40:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:40:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-11-20 09:40:05,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.656 [2024-11-20 09:40:05,681 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 56 flow. Second operand 5 states and 82 transitions. [2024-11-20 09:40:05,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 42 transitions, 175 flow [2024-11-20 09:40:05,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 161 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:40:05,686 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2024-11-20 09:40:05,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-11-20 09:40:05,690 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2024-11-20 09:40:05,691 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2024-11-20 09:40:05,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2024-11-20 09:40:05,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:05,692 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:05,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:40:05,692 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:05,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash -668978712, now seen corresponding path program 1 times [2024-11-20 09:40:05,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045274221] [2024-11-20 09:40:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:05,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:05,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045274221] [2024-11-20 09:40:05,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045274221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:05,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760577210] [2024-11-20 09:40:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:05,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:05,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:05,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:40:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:05,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 09:40:05,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:06,076 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:40:06,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760577210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:06,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:40:06,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 6 [2024-11-20 09:40:06,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688607563] [2024-11-20 09:40:06,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:06,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:40:06,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:40:06,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:40:06,103 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-11-20 09:40:06,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:40:06,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:06,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-11-20 09:40:06,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:06,353 INFO L124 PetriNetUnfolderBase]: 151/297 cut-off events. [2024-11-20 09:40:06,353 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2024-11-20 09:40:06,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 297 events. 151/297 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1153 event pairs, 0 based on Foata normal form. 18/314 useless extension candidates. Maximal degree in co-relation 281. Up to 144 conditions per place. [2024-11-20 09:40:06,356 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 41 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2024-11-20 09:40:06,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 313 flow [2024-11-20 09:40:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:40:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:40:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-11-20 09:40:06,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.504 [2024-11-20 09:40:06,359 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 10 states and 126 transitions. [2024-11-20 09:40:06,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 313 flow [2024-11-20 09:40:06,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 60 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:40:06,361 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 180 flow [2024-11-20 09:40:06,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=180, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-11-20 09:40:06,362 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2024-11-20 09:40:06,363 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 180 flow [2024-11-20 09:40:06,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:40:06,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:06,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:06,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:40:06,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:06,579 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:06,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1597033034, now seen corresponding path program 1 times [2024-11-20 09:40:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:06,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702708634] [2024-11-20 09:40:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:07,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702708634] [2024-11-20 09:40:07,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702708634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210186847] [2024-11-20 09:40:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:07,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:07,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:07,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:07,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:40:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:07,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 09:40:07,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:15,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:15,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210186847] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:15,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:40:15,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 17 [2024-11-20 09:40:15,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700026900] [2024-11-20 09:40:15,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:15,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 09:40:15,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:15,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 09:40:15,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=226, Unknown=2, NotChecked=0, Total=306 [2024-11-20 09:40:15,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-11-20 09:40:15,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 180 flow. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:40:15,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:15,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-11-20 09:40:15,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:16,583 INFO L124 PetriNetUnfolderBase]: 542/923 cut-off events. [2024-11-20 09:40:16,583 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2024-11-20 09:40:16,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2891 conditions, 923 events. 542/923 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4035 event pairs, 39 based on Foata normal form. 1/923 useless extension candidates. Maximal degree in co-relation 1794. Up to 230 conditions per place. [2024-11-20 09:40:16,593 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 88 selfloop transitions, 42 changer transitions 13/146 dead transitions. [2024-11-20 09:40:16,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 146 transitions, 932 flow [2024-11-20 09:40:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 09:40:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 09:40:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 204 transitions. [2024-11-20 09:40:16,598 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-11-20 09:40:16,599 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 180 flow. Second operand 16 states and 204 transitions. [2024-11-20 09:40:16,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 146 transitions, 932 flow [2024-11-20 09:40:16,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 146 transitions, 921 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-20 09:40:16,609 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 531 flow [2024-11-20 09:40:16,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=531, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-11-20 09:40:16,610 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2024-11-20 09:40:16,611 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 531 flow [2024-11-20 09:40:16,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:40:16,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:16,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:16,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 09:40:16,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-20 09:40:16,817 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:16,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:16,818 INFO L85 PathProgramCache]: Analyzing trace with hash 425281426, now seen corresponding path program 2 times [2024-11-20 09:40:16,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:16,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008336405] [2024-11-20 09:40:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:16,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:16,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008336405] [2024-11-20 09:40:16,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008336405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:16,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:16,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:40:16,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937537737] [2024-11-20 09:40:16,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:16,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:40:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:40:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:40:16,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2024-11-20 09:40:16,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 531 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2024-11-20 09:40:16,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:16,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2024-11-20 09:40:16,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:17,028 INFO L124 PetriNetUnfolderBase]: 357/700 cut-off events. [2024-11-20 09:40:17,029 INFO L125 PetriNetUnfolderBase]: For 3604/3690 co-relation queries the response was YES. [2024-11-20 09:40:17,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3043 conditions, 700 events. 357/700 cut-off events. For 3604/3690 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3373 event pairs, 12 based on Foata normal form. 16/710 useless extension candidates. Maximal degree in co-relation 3008. Up to 326 conditions per place. [2024-11-20 09:40:17,035 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 71 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2024-11-20 09:40:17,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 950 flow [2024-11-20 09:40:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:40:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:40:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-20 09:40:17,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.624 [2024-11-20 09:40:17,037 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 531 flow. Second operand 5 states and 78 transitions. [2024-11-20 09:40:17,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 950 flow [2024-11-20 09:40:17,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 814 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-11-20 09:40:17,056 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 531 flow [2024-11-20 09:40:17,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=531, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-11-20 09:40:17,057 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2024-11-20 09:40:17,057 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 531 flow [2024-11-20 09:40:17,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2024-11-20 09:40:17,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:17,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:17,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:40:17,058 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:17,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:17,058 INFO L85 PathProgramCache]: Analyzing trace with hash -875479503, now seen corresponding path program 1 times [2024-11-20 09:40:17,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:17,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268985457] [2024-11-20 09:40:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:17,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268985457] [2024-11-20 09:40:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268985457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:17,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053487868] [2024-11-20 09:40:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:17,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:17,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:17,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:17,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:40:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:17,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:40:17,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:18,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:19,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053487868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:19,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:19,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-20 09:40:19,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817288064] [2024-11-20 09:40:19,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:19,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 09:40:19,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:19,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 09:40:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:40:19,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-11-20 09:40:19,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 531 flow. Second operand has 25 states, 25 states have (on average 7.08) internal successors, (177), 25 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:40:19,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:19,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-11-20 09:40:19,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:30,979 INFO L124 PetriNetUnfolderBase]: 1864/3256 cut-off events. [2024-11-20 09:40:30,979 INFO L125 PetriNetUnfolderBase]: For 12740/12740 co-relation queries the response was YES. [2024-11-20 09:40:30,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13407 conditions, 3256 events. 1864/3256 cut-off events. For 12740/12740 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18810 event pairs, 28 based on Foata normal form. 20/3275 useless extension candidates. Maximal degree in co-relation 9902. Up to 729 conditions per place. [2024-11-20 09:40:31,001 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 283 selfloop transitions, 225 changer transitions 156/667 dead transitions. [2024-11-20 09:40:31,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 667 transitions, 5576 flow [2024-11-20 09:40:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-20 09:40:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2024-11-20 09:40:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 933 transitions. [2024-11-20 09:40:31,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41010989010989013 [2024-11-20 09:40:31,005 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 531 flow. Second operand 91 states and 933 transitions. [2024-11-20 09:40:31,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 667 transitions, 5576 flow [2024-11-20 09:40:31,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 667 transitions, 5520 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 09:40:31,040 INFO L231 Difference]: Finished difference. Result has 210 places, 287 transitions, 3010 flow [2024-11-20 09:40:31,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=3010, PETRI_PLACES=210, PETRI_TRANSITIONS=287} [2024-11-20 09:40:31,041 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 183 predicate places. [2024-11-20 09:40:31,041 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 287 transitions, 3010 flow [2024-11-20 09:40:31,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.08) internal successors, (177), 25 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:40:31,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:31,041 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:31,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:40:31,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:31,242 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:31,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash 569790227, now seen corresponding path program 2 times [2024-11-20 09:40:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:31,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348012886] [2024-11-20 09:40:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:31,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:31,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:31,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348012886] [2024-11-20 09:40:31,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348012886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:31,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673074078] [2024-11-20 09:40:31,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:40:31,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:31,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:31,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:31,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:40:31,906 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:40:31,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:31,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 09:40:31,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:32,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:33,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673074078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:33,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:33,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-20 09:40:33,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364148690] [2024-11-20 09:40:33,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:33,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:40:33,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:40:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:40:33,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-11-20 09:40:33,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 287 transitions, 3010 flow. Second operand has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:40:33,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:33,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-11-20 09:40:33,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:38,612 INFO L124 PetriNetUnfolderBase]: 2699/4708 cut-off events. [2024-11-20 09:40:38,613 INFO L125 PetriNetUnfolderBase]: For 75043/75043 co-relation queries the response was YES. [2024-11-20 09:40:38,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31977 conditions, 4708 events. 2699/4708 cut-off events. For 75043/75043 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29398 event pairs, 87 based on Foata normal form. 15/4722 useless extension candidates. Maximal degree in co-relation 31776. Up to 1468 conditions per place. [2024-11-20 09:40:38,674 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 363 selfloop transitions, 313 changer transitions 107/786 dead transitions. [2024-11-20 09:40:38,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 786 transitions, 10446 flow [2024-11-20 09:40:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-20 09:40:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-11-20 09:40:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 672 transitions. [2024-11-20 09:40:38,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4335483870967742 [2024-11-20 09:40:38,678 INFO L175 Difference]: Start difference. First operand has 210 places, 287 transitions, 3010 flow. Second operand 62 states and 672 transitions. [2024-11-20 09:40:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 786 transitions, 10446 flow [2024-11-20 09:40:38,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 786 transitions, 9044 flow, removed 693 selfloop flow, removed 28 redundant places. [2024-11-20 09:40:38,943 INFO L231 Difference]: Finished difference. Result has 261 places, 496 transitions, 6248 flow [2024-11-20 09:40:38,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=6248, PETRI_PLACES=261, PETRI_TRANSITIONS=496} [2024-11-20 09:40:38,946 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 234 predicate places. [2024-11-20 09:40:38,946 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 496 transitions, 6248 flow [2024-11-20 09:40:38,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:40:38,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:38,946 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:38,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 09:40:39,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:39,151 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:39,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash 588700951, now seen corresponding path program 3 times [2024-11-20 09:40:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:39,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229171782] [2024-11-20 09:40:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:39,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:39,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:39,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229171782] [2024-11-20 09:40:39,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229171782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:39,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:39,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:40:39,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880950490] [2024-11-20 09:40:39,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:39,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:40:39,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:39,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:40:39,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:40:39,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2024-11-20 09:40:39,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 496 transitions, 6248 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2024-11-20 09:40:39,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:39,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2024-11-20 09:40:39,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:40,394 INFO L124 PetriNetUnfolderBase]: 2677/4775 cut-off events. [2024-11-20 09:40:40,394 INFO L125 PetriNetUnfolderBase]: For 78176/78754 co-relation queries the response was YES. [2024-11-20 09:40:40,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30962 conditions, 4775 events. 2677/4775 cut-off events. For 78176/78754 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 31118 event pairs, 13 based on Foata normal form. 124/4882 useless extension candidates. Maximal degree in co-relation 30840. Up to 1146 conditions per place. [2024-11-20 09:40:40,450 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 602 selfloop transitions, 234 changer transitions 0/888 dead transitions. [2024-11-20 09:40:40,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 888 transitions, 12929 flow [2024-11-20 09:40:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:40:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:40:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-11-20 09:40:40,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-11-20 09:40:40,451 INFO L175 Difference]: Start difference. First operand has 261 places, 496 transitions, 6248 flow. Second operand 9 states and 111 transitions. [2024-11-20 09:40:40,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 888 transitions, 12929 flow [2024-11-20 09:40:40,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 888 transitions, 12109 flow, removed 372 selfloop flow, removed 22 redundant places. [2024-11-20 09:40:40,837 INFO L231 Difference]: Finished difference. Result has 237 places, 603 transitions, 8008 flow [2024-11-20 09:40:40,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8008, PETRI_PLACES=237, PETRI_TRANSITIONS=603} [2024-11-20 09:40:40,840 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 210 predicate places. [2024-11-20 09:40:40,840 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 603 transitions, 8008 flow [2024-11-20 09:40:40,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2024-11-20 09:40:40,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:40,841 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:40,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:40:40,841 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:40,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:40,842 INFO L85 PathProgramCache]: Analyzing trace with hash -350404842, now seen corresponding path program 3 times [2024-11-20 09:40:40,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:40,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940678254] [2024-11-20 09:40:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:40,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:45,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:45,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940678254] [2024-11-20 09:40:45,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940678254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856318005] [2024-11-20 09:40:45,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:40:45,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:45,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:45,847 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:45,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:40:45,939 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 09:40:45,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:45,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 09:40:45,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:46,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:54,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856318005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:54,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:54,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 27 [2024-11-20 09:40:54,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483407991] [2024-11-20 09:40:54,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:54,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 09:40:54,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:54,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 09:40:54,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=584, Unknown=1, NotChecked=0, Total=756 [2024-11-20 09:40:59,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-20 09:41:03,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-20 09:41:03,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2024-11-20 09:41:03,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 603 transitions, 8008 flow. Second operand has 28 states, 28 states have (on average 8.071428571428571) internal successors, (226), 28 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:41:03,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:03,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2024-11-20 09:41:03,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:15,447 INFO L124 PetriNetUnfolderBase]: 4127/7465 cut-off events. [2024-11-20 09:41:15,448 INFO L125 PetriNetUnfolderBase]: For 131562/131898 co-relation queries the response was YES. [2024-11-20 09:41:15,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53747 conditions, 7465 events. 4127/7465 cut-off events. For 131562/131898 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 52754 event pairs, 51 based on Foata normal form. 62/7517 useless extension candidates. Maximal degree in co-relation 53328. Up to 2766 conditions per place. [2024-11-20 09:41:15,556 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 673 selfloop transitions, 433 changer transitions 101/1221 dead transitions. [2024-11-20 09:41:15,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 1221 transitions, 18570 flow [2024-11-20 09:41:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-20 09:41:15,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-11-20 09:41:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 672 transitions. [2024-11-20 09:41:15,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48872727272727273 [2024-11-20 09:41:15,563 INFO L175 Difference]: Start difference. First operand has 237 places, 603 transitions, 8008 flow. Second operand 55 states and 672 transitions. [2024-11-20 09:41:15,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 1221 transitions, 18570 flow [2024-11-20 09:41:16,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1221 transitions, 18374 flow, removed 92 selfloop flow, removed 2 redundant places. [2024-11-20 09:41:16,453 INFO L231 Difference]: Finished difference. Result has 320 places, 857 transitions, 13318 flow [2024-11-20 09:41:16,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7972, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=13318, PETRI_PLACES=320, PETRI_TRANSITIONS=857} [2024-11-20 09:41:16,454 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 293 predicate places. [2024-11-20 09:41:16,456 INFO L471 AbstractCegarLoop]: Abstraction has has 320 places, 857 transitions, 13318 flow [2024-11-20 09:41:16,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.071428571428571) internal successors, (226), 28 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:41:16,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:16,456 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:16,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 09:41:16,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:16,657 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:16,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash -745570450, now seen corresponding path program 4 times [2024-11-20 09:41:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:16,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420598306] [2024-11-20 09:41:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:17,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:17,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420598306] [2024-11-20 09:41:17,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420598306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:17,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904302480] [2024-11-20 09:41:17,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:41:17,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:17,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:17,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:41:17,306 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:41:17,306 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:17,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 09:41:17,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:18,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904302480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:19,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2024-11-20 09:41:19,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431387312] [2024-11-20 09:41:19,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:19,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-20 09:41:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-20 09:41:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2024-11-20 09:41:19,614 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-11-20 09:41:19,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 857 transitions, 13318 flow. Second operand has 32 states, 32 states have (on average 6.96875) internal successors, (223), 32 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:41:19,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:19,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-11-20 09:41:19,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:28,581 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~S~0 c_~T~0))) (let ((.cse7 (mod c_~m~0 4294967296)) (.cse8 (mod .cse4 4294967296)) (.cse1 (mod c_~t~0 4294967296))) (let ((.cse6 (+ c_~S~0 c_~T~0 .cse1)) (.cse5 (+ c_~s~0 c_~t~0 c_~m~0)) (.cse3 (= .cse7 .cse8)) (.cse9 (+ (div c_~s~0 4294967296) (div c_~t~0 4294967296) (div c_~m~0 4294967296))) (.cse10 (div .cse4 4294967296))) (and (let ((.cse2 (+ c_~S~0 1))) (let ((.cse0 (mod .cse2 4294967296))) (or (and (= c_~m~0 2) (= (+ c_~s~0 1) c_~S~0) (<= 1 .cse0)) (and (<= 1 .cse1) (= c_~s~0 .cse2) (= c_~m~0 0) (<= .cse0 0))))) (or .cse3 (and (<= (div c_thread1Thread1of1ForFork1_~cond~0 256) 0) (<= 1 c_thread1Thread1of1ForFork1_~cond~0))) (<= 1 (mod c_~S~0 4294967296)) (<= 1 (mod c_~T~0 4294967296)) (<= .cse1 0) (= c_~T~0 (+ c_~t~0 1)) (or (< (mod c_~s~0 4294967296) 1) (and (<= .cse4 .cse5) (<= .cse5 .cse6))) (<= .cse6 .cse5) (or .cse3 (< .cse7 .cse8) (< .cse9 .cse10)) (<= .cse9 .cse10))))) is different from false