./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 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:30:49,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:30:49,741 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:30:49,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:30:49,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:30:49,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:30:49,783 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:30:49,783 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:30:49,784 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:30:49,785 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:30:49,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:30:49,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:30:49,787 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:30:49,789 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:30:49,789 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:30:49,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:30:49,790 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:30:49,790 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:30:49,790 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:30:49,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:30:49,791 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:30:49,794 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:30:49,794 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:30:49,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:30:49,795 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:30:49,795 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:30:49,795 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:30:49,795 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:30:49,796 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:30:49,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:30:49,797 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:30:49,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:30:49,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:30:49,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:30:49,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:30:49,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:30:49,799 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:30:49,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:30:49,799 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:30:49,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:30:49,800 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:30:49,800 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:30:49,801 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2024-10-11 14:30:50,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:30:50,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:30:50,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:30:50,066 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:30:50,066 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:30:50,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-10-11 14:30:51,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:30:51,632 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:30:51,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-10-11 14:30:51,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b2576bc48/31e01412a9ec4452b6cc23e7a43cf3b1/FLAGaf978defd [2024-10-11 14:30:51,654 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b2576bc48/31e01412a9ec4452b6cc23e7a43cf3b1 [2024-10-11 14:30:51,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:30:51,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:30:51,660 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:30:51,660 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:30:51,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:30:51,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@256f7094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51, skipping insertion in model container [2024-10-11 14:30:51,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,690 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:30:51,877 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-10-11 14:30:51,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:30:51,889 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:30:51,907 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-10-11 14:30:51,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:30:51,924 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:30:51,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51 WrapperNode [2024-10-11 14:30:51,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:30:51,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:30:51,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:30:51,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:30:51,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,940 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,957 INFO L138 Inliner]: procedures = 20, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 48 [2024-10-11 14:30:51,958 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:30:51,958 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:30:51,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:30:51,959 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:30:51,968 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,971 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,983 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]. [2024-10-11 14:30:51,983 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,983 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,988 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,992 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:51,996 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:52,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:52,003 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:30:52,004 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:30:52,004 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:30:52,004 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:30:52,005 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (1/1) ... [2024-10-11 14:30:52,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:30:52,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:52,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:30:52,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:30:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:30:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:30:52,078 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:30:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:30:52,078 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:30:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:30:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:30:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:30:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:30:52,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:30:52,080 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:30:52,158 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:30:52,160 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:30:52,337 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:30:52,337 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:30:52,491 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:30:52,491 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 14:30:52,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:52 BoogieIcfgContainer [2024-10-11 14:30:52,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:30:52,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:30:52,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:30:52,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:30:52,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:51" (1/3) ... [2024-10-11 14:30:52,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ca7508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:52, skipping insertion in model container [2024-10-11 14:30:52,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:51" (2/3) ... [2024-10-11 14:30:52,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ca7508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:52, skipping insertion in model container [2024-10-11 14:30:52,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:52" (3/3) ... [2024-10-11 14:30:52,501 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2024-10-11 14:30:52,517 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:30:52,518 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:30:52,518 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:30:52,564 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:30:52,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 25 transitions, 64 flow [2024-10-11 14:30:52,625 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2024-10-11 14:30:52,626 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:30:52,629 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. [2024-10-11 14:30:52,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 25 transitions, 64 flow [2024-10-11 14:30:52,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 22 transitions, 56 flow [2024-10-11 14:30:52,640 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:30:52,648 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;@13c40820, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:30:52,649 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:30:52,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:30:52,658 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-10-11 14:30:52,658 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:30:52,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:52,659 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:52,660 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:30:52,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1256207023, now seen corresponding path program 1 times [2024-10-11 14:30:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214083117] [2024-10-11 14:30:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:53,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:53,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214083117] [2024-10-11 14:30:53,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214083117] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:53,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:30:53,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:30:53,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299806878] [2024-10-11 14:30:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:53,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:30:53,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:30:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:30:53,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2024-10-11 14:30:53,346 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) [2024-10-11 14:30:53,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:53,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2024-10-11 14:30:53,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:53,506 INFO L124 PetriNetUnfolderBase]: 104/206 cut-off events. [2024-10-11 14:30:53,507 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-11 14:30:53,511 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. [2024-10-11 14:30:53,516 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 29 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2024-10-11 14:30:53,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 42 transitions, 175 flow [2024-10-11 14:30:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:30:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:30:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-10-11 14:30:53,527 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.656 [2024-10-11 14:30:53,529 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 56 flow. Second operand 5 states and 82 transitions. [2024-10-11 14:30:53,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 42 transitions, 175 flow [2024-10-11 14:30:53,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 161 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:30:53,534 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2024-10-11 14:30:53,536 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} [2024-10-11 14:30:53,541 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2024-10-11 14:30:53,542 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2024-10-11 14:30:53,542 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) [2024-10-11 14:30:53,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:53,542 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:53,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:30:53,543 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:30:53,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash -668978712, now seen corresponding path program 1 times [2024-10-11 14:30:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:53,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193075146] [2024-10-11 14:30:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:53,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:53,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193075146] [2024-10-11 14:30:53,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193075146] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:53,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455527469] [2024-10-11 14:30:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:53,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:53,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:53,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:53,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:30:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:53,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:30:53,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:30:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:54,062 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:30:54,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455527469] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:30:54,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:30:54,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 6 [2024-10-11 14:30:54,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025189300] [2024-10-11 14:30:54,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:30:54,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:30:54,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:30:54,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:30:54,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:30:54,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-11 14:30:54,098 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) [2024-10-11 14:30:54,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:30:54,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-11 14:30:54,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:30:54,328 INFO L124 PetriNetUnfolderBase]: 151/297 cut-off events. [2024-10-11 14:30:54,328 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2024-10-11 14:30:54,332 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. [2024-10-11 14:30:54,334 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 41 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2024-10-11 14:30:54,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 313 flow [2024-10-11 14:30:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:30:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:30:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-10-11 14:30:54,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.504 [2024-10-11 14:30:54,338 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 10 states and 126 transitions. [2024-10-11 14:30:54,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 313 flow [2024-10-11 14:30:54,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 60 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:30:54,343 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 180 flow [2024-10-11 14:30:54,344 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} [2024-10-11 14:30:54,345 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2024-10-11 14:30:54,345 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 180 flow [2024-10-11 14:30:54,346 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) [2024-10-11 14:30:54,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:30:54,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:30:54,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:30:54,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:54,551 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:30:54,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:30:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1597033034, now seen corresponding path program 1 times [2024-10-11 14:30:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:30:54,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950860939] [2024-10-11 14:30:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:30:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:30:55,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:30:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950860939] [2024-10-11 14:30:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950860939] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:30:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505678956] [2024-10-11 14:30:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:30:55,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:30:55,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:30:55,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:30:55,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:30:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:30:55,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 14:30:55,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:03,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:03,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505678956] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:03,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:31:03,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 17 [2024-10-11 14:31:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067150560] [2024-10-11 14:31:03,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:03,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:31:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:31:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=226, Unknown=1, NotChecked=0, Total=306 [2024-10-11 14:31:03,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-10-11 14:31:03,947 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) [2024-10-11 14:31:03,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:03,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-10-11 14:31:03,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:04,676 INFO L124 PetriNetUnfolderBase]: 542/923 cut-off events. [2024-10-11 14:31:04,677 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2024-10-11 14:31:04,680 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. [2024-10-11 14:31:04,687 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 88 selfloop transitions, 42 changer transitions 13/146 dead transitions. [2024-10-11 14:31:04,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 146 transitions, 932 flow [2024-10-11 14:31:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:31:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:31:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 204 transitions. [2024-10-11 14:31:04,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-10-11 14:31:04,692 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 180 flow. Second operand 16 states and 204 transitions. [2024-10-11 14:31:04,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 146 transitions, 932 flow [2024-10-11 14:31:04,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 146 transitions, 921 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-11 14:31:04,704 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 531 flow [2024-10-11 14:31:04,705 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} [2024-10-11 14:31:04,706 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2024-10-11 14:31:04,706 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 531 flow [2024-10-11 14:31:04,707 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) [2024-10-11 14:31:04,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:04,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:04,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:31:04,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:04,912 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:04,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash 425281426, now seen corresponding path program 2 times [2024-10-11 14:31:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:04,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156404417] [2024-10-11 14:31:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:05,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:05,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156404417] [2024-10-11 14:31:05,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156404417] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:05,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:05,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:31:05,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659139686] [2024-10-11 14:31:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:05,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:31:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:31:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:31:05,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 25 [2024-10-11 14:31:05,049 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) [2024-10-11 14:31:05,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:05,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 25 [2024-10-11 14:31:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:05,235 INFO L124 PetriNetUnfolderBase]: 357/700 cut-off events. [2024-10-11 14:31:05,236 INFO L125 PetriNetUnfolderBase]: For 3604/3690 co-relation queries the response was YES. [2024-10-11 14:31:05,240 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. [2024-10-11 14:31:05,244 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 71 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2024-10-11 14:31:05,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 950 flow [2024-10-11 14:31:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-10-11 14:31:05,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.624 [2024-10-11 14:31:05,246 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 531 flow. Second operand 5 states and 78 transitions. [2024-10-11 14:31:05,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 950 flow [2024-10-11 14:31:05,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 814 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-10-11 14:31:05,265 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 531 flow [2024-10-11 14:31:05,265 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} [2024-10-11 14:31:05,266 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2024-10-11 14:31:05,266 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 531 flow [2024-10-11 14:31:05,267 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) [2024-10-11 14:31:05,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:05,267 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] [2024-10-11 14:31:05,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:31:05,267 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:05,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:05,268 INFO L85 PathProgramCache]: Analyzing trace with hash -875479503, now seen corresponding path program 1 times [2024-10-11 14:31:05,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:05,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304231910] [2024-10-11 14:31:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:05,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:06,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:06,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304231910] [2024-10-11 14:31:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304231910] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:06,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675646866] [2024-10-11 14:31:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:06,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:06,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:06,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:06,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:31:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:06,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:31:06,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:06,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:08,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675646866] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:08,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:08,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:31:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838174303] [2024-10-11 14:31:08,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:08,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:31:08,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:08,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:31:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:31:08,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-10-11 14:31:08,281 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) [2024-10-11 14:31:08,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:08,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-10-11 14:31:08,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:21,602 INFO L124 PetriNetUnfolderBase]: 1864/3256 cut-off events. [2024-10-11 14:31:21,603 INFO L125 PetriNetUnfolderBase]: For 12740/12740 co-relation queries the response was YES. [2024-10-11 14:31:21,616 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. [2024-10-11 14:31:21,630 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 283 selfloop transitions, 225 changer transitions 156/667 dead transitions. [2024-10-11 14:31:21,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 667 transitions, 5576 flow [2024-10-11 14:31:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-10-11 14:31:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2024-10-11 14:31:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 933 transitions. [2024-10-11 14:31:21,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41010989010989013 [2024-10-11 14:31:21,638 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 531 flow. Second operand 91 states and 933 transitions. [2024-10-11 14:31:21,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 667 transitions, 5576 flow [2024-10-11 14:31:21,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 667 transitions, 5520 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:21,692 INFO L231 Difference]: Finished difference. Result has 210 places, 287 transitions, 3010 flow [2024-10-11 14:31:21,693 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} [2024-10-11 14:31:21,694 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 183 predicate places. [2024-10-11 14:31:21,695 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 287 transitions, 3010 flow [2024-10-11 14:31:21,695 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) [2024-10-11 14:31:21,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:21,695 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] [2024-10-11 14:31:21,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:31:21,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:21,957 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:21,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash 569790227, now seen corresponding path program 2 times [2024-10-11 14:31:21,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:21,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865954093] [2024-10-11 14:31:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:21,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:23,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865954093] [2024-10-11 14:31:23,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865954093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721185007] [2024-10-11 14:31:23,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:23,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:23,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:23,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:23,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:31:23,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:23,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:23,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:31:23,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:23,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:24,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721185007] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:24,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:24,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-10-11 14:31:24,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580404323] [2024-10-11 14:31:24,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:24,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:31:24,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:31:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:31:24,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-10-11 14:31:24,818 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) [2024-10-11 14:31:24,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:24,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-10-11 14:31:24,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:29,518 INFO L124 PetriNetUnfolderBase]: 2699/4708 cut-off events. [2024-10-11 14:31:29,518 INFO L125 PetriNetUnfolderBase]: For 75043/75043 co-relation queries the response was YES. [2024-10-11 14:31:29,545 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. [2024-10-11 14:31:29,571 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 363 selfloop transitions, 313 changer transitions 107/786 dead transitions. [2024-10-11 14:31:29,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 786 transitions, 10446 flow [2024-10-11 14:31:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-11 14:31:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-10-11 14:31:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 672 transitions. [2024-10-11 14:31:29,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4335483870967742 [2024-10-11 14:31:29,574 INFO L175 Difference]: Start difference. First operand has 210 places, 287 transitions, 3010 flow. Second operand 62 states and 672 transitions. [2024-10-11 14:31:29,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 786 transitions, 10446 flow [2024-10-11 14:31:29,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 786 transitions, 9044 flow, removed 693 selfloop flow, removed 28 redundant places. [2024-10-11 14:31:29,800 INFO L231 Difference]: Finished difference. Result has 261 places, 496 transitions, 6248 flow [2024-10-11 14:31:29,801 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} [2024-10-11 14:31:29,801 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 234 predicate places. [2024-10-11 14:31:29,802 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 496 transitions, 6248 flow [2024-10-11 14:31:29,802 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) [2024-10-11 14:31:29,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:29,806 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:29,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:30,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 14:31:30,007 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:30,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash 588700951, now seen corresponding path program 3 times [2024-10-11 14:31:30,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:30,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467020913] [2024-10-11 14:31:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:30,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467020913] [2024-10-11 14:31:30,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467020913] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:30,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:30,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321203314] [2024-10-11 14:31:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:30,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:30,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:30,231 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2024-10-11 14:31:30,231 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) [2024-10-11 14:31:30,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:30,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2024-10-11 14:31:30,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:31,522 INFO L124 PetriNetUnfolderBase]: 2677/4775 cut-off events. [2024-10-11 14:31:31,522 INFO L125 PetriNetUnfolderBase]: For 78176/78754 co-relation queries the response was YES. [2024-10-11 14:31:31,546 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. [2024-10-11 14:31:31,572 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 602 selfloop transitions, 234 changer transitions 0/888 dead transitions. [2024-10-11 14:31:31,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 888 transitions, 12929 flow [2024-10-11 14:31:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:31:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:31:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-10-11 14:31:31,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-10-11 14:31:31,574 INFO L175 Difference]: Start difference. First operand has 261 places, 496 transitions, 6248 flow. Second operand 9 states and 111 transitions. [2024-10-11 14:31:31,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 888 transitions, 12929 flow [2024-10-11 14:31:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 888 transitions, 12109 flow, removed 372 selfloop flow, removed 22 redundant places. [2024-10-11 14:31:32,005 INFO L231 Difference]: Finished difference. Result has 237 places, 603 transitions, 8008 flow [2024-10-11 14:31:32,006 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} [2024-10-11 14:31:32,007 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 210 predicate places. [2024-10-11 14:31:32,007 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 603 transitions, 8008 flow [2024-10-11 14:31:32,008 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) [2024-10-11 14:31:32,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:32,008 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] [2024-10-11 14:31:32,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:31:32,008 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:32,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:32,008 INFO L85 PathProgramCache]: Analyzing trace with hash -350404842, now seen corresponding path program 3 times [2024-10-11 14:31:32,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:32,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419585436] [2024-10-11 14:31:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:32,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419585436] [2024-10-11 14:31:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419585436] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:32,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026899469] [2024-10-11 14:31:32,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:31:32,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:32,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:32,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:32,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:31:32,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:31:32,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:32,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 14:31:32,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:33,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:53,939 WARN L286 SmtUtils]: Spent 20.02s on a formula simplification. DAG size of input: 31 DAG size of output: 15 (called from [L 188] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2024-10-11 14:32:06,390 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 75 DAG size of output: 70 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 14:32:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:07,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026899469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:07,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:07,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 27 [2024-10-11 14:32:07,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342493633] [2024-10-11 14:32:07,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:07,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 14:32:07,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 14:32:07,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2024-10-11 14:32:07,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 25 [2024-10-11 14:32:07,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 603 transitions, 8008 flow. Second operand has 28 states, 28 states have (on average 9.892857142857142) internal successors, (277), 28 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:07,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:07,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 25 [2024-10-11 14:32:07,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand