./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU --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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:05:15,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:05:15,496 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:05:15,501 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:05:15,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:05:15,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:05:15,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:05:15,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:05:15,548 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:05:15,550 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:05:15,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:05:15,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:05:15,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:05:15,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:05:15,554 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:05:15,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:05:15,555 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:05:15,556 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:05:15,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:05:15,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:05:15,560 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:05:15,561 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:05:15,561 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:05:15,561 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:05:15,562 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:05:15,562 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:05:15,562 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:05:15,563 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:05:15,563 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:05:15,563 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:05:15,564 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:05:15,564 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:05:15,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:05:15,566 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:05:15,567 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:05:15,568 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:05:15,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:05:15,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:05:15,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:05:15,569 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:05:15,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:05:15,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:05:15,570 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-10-31 22:05:15,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:05:15,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:05:15,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:05:15,889 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:05:15,889 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:05:15,890 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c Unable to find full path for "g++" [2024-10-31 22:05:18,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:05:18,368 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:05:18,368 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-10-31 22:05:18,377 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/data/66c8742fd/7ad15a8b42664617b430224a4562c744/FLAG2ac5dae48 [2024-10-31 22:05:18,757 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/data/66c8742fd/7ad15a8b42664617b430224a4562c744 [2024-10-31 22:05:18,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:05:18,766 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:05:18,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:05:18,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:05:18,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:05:18,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:05:18" (1/1) ... [2024-10-31 22:05:18,788 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81fcf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:18, skipping insertion in model container [2024-10-31 22:05:18,788 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:05:18" (1/1) ... [2024-10-31 22:05:18,827 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:05:19,117 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-10-31 22:05:19,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:05:19,141 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:05:19,170 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-10-31 22:05:19,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:05:19,195 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:05:19,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19 WrapperNode [2024-10-31 22:05:19,196 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:05:19,197 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:05:19,197 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:05:19,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:05:19,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,249 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 187 [2024-10-31 22:05:19,250 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:05:19,251 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:05:19,251 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:05:19,251 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:05:19,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,268 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,285 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:05:19,289 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:05:19,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:05:19,315 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:05:19,315 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:05:19,316 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (1/1) ... [2024-10-31 22:05:19,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:05:19,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:19,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:05:19,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:05:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:05:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:05:19,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:05:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:05:19,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:05:19,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:05:19,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:05:19,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:05:19,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:05:19,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:05:19,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:05:19,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:05:19,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:05:19,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:05:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:05:19,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:05:19,390 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:05:19,526 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:05:19,531 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:05:19,945 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:05:19,946 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:05:20,261 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:05:20,262 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:05:20,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:20 BoogieIcfgContainer [2024-10-31 22:05:20,263 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:05:20,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:05:20,267 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:05:20,270 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:05:20,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:05:18" (1/3) ... [2024-10-31 22:05:20,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57215bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:05:20, skipping insertion in model container [2024-10-31 22:05:20,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:19" (2/3) ... [2024-10-31 22:05:20,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57215bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:05:20, skipping insertion in model container [2024-10-31 22:05:20,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:20" (3/3) ... [2024-10-31 22:05:20,275 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-10-31 22:05:20,291 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:05:20,292 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:05:20,292 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:05:20,334 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:05:20,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 31 transitions, 76 flow [2024-10-31 22:05:20,416 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-10-31 22:05:20,420 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:05:20,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 5/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-31 22:05:20,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 31 transitions, 76 flow [2024-10-31 22:05:20,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 68 flow [2024-10-31 22:05:20,442 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:05:20,450 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;@59174c0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:05:20,450 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:05:20,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:05:20,473 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-10-31 22:05:20,474 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:05:20,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:20,475 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:20,475 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:05:20,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1103126271, now seen corresponding path program 1 times [2024-10-31 22:05:20,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:20,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984608460] [2024-10-31 22:05:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:20,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:21,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984608460] [2024-10-31 22:05:21,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984608460] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:21,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:21,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:05:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838816445] [2024-10-31 22:05:21,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:21,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:05:21,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:21,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:05:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:21,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-31 22:05:21,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-10-31 22:05:21,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:21,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-31 22:05:21,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:21,410 INFO L124 PetriNetUnfolderBase]: 202/345 cut-off events. [2024-10-31 22:05:21,411 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-31 22:05:21,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 345 events. 202/345 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1377 event pairs, 51 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 651. Up to 188 conditions per place. [2024-10-31 22:05:21,421 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 31 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-10-31 22:05:21,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 163 flow [2024-10-31 22:05:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:05:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:05:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-10-31 22:05:21,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-10-31 22:05:21,437 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 68 flow. Second operand 4 states and 67 transitions. [2024-10-31 22:05:21,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 163 flow [2024-10-31 22:05:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 153 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:05:21,444 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 74 flow [2024-10-31 22:05:21,446 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-10-31 22:05:21,449 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-10-31 22:05:21,451 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 74 flow [2024-10-31 22:05:21,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-10-31 22:05:21,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:21,453 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:21,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:05:21,454 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:05:21,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1933867166, now seen corresponding path program 1 times [2024-10-31 22:05:21,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:21,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443025874] [2024-10-31 22:05:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:21,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:21,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443025874] [2024-10-31 22:05:21,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443025874] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:05:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539463851] [2024-10-31 22:05:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:21,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:05:21,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:21,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:05:21,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:05:21,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-31 22:05:21,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:21,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:21,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-31 22:05:21,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:21,829 INFO L124 PetriNetUnfolderBase]: 202/370 cut-off events. [2024-10-31 22:05:21,829 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-31 22:05:21,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 370 events. 202/370 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1558 event pairs, 126 based on Foata normal form. 1/335 useless extension candidates. Maximal degree in co-relation 285. Up to 320 conditions per place. [2024-10-31 22:05:21,835 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-10-31 22:05:21,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-10-31 22:05:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:05:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:05:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-10-31 22:05:21,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-10-31 22:05:21,838 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 74 flow. Second operand 3 states and 48 transitions. [2024-10-31 22:05:21,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-10-31 22:05:21,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:05:21,840 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 82 flow [2024-10-31 22:05:21,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2024-10-31 22:05:21,841 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-10-31 22:05:21,842 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 82 flow [2024-10-31 22:05:21,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:21,842 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:21,842 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] [2024-10-31 22:05:21,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:05:21,843 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:05:21,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash -720044749, now seen corresponding path program 1 times [2024-10-31 22:05:21,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:21,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817565250] [2024-10-31 22:05:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:21,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:05:22,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817565250] [2024-10-31 22:05:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817565250] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:22,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:22,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:05:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304999294] [2024-10-31 22:05:22,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:22,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:05:22,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:05:22,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:05:22,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-31 22:05:22,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:22,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:22,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-31 22:05:22,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:22,216 INFO L124 PetriNetUnfolderBase]: 257/478 cut-off events. [2024-10-31 22:05:22,217 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-31 22:05:22,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 478 events. 257/478 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2116 event pairs, 94 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 951. Up to 216 conditions per place. [2024-10-31 22:05:22,222 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 34 selfloop transitions, 2 changer transitions 2/44 dead transitions. [2024-10-31 22:05:22,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 194 flow [2024-10-31 22:05:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:05:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:05:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-10-31 22:05:22,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-10-31 22:05:22,227 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 82 flow. Second operand 3 states and 60 transitions. [2024-10-31 22:05:22,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 194 flow [2024-10-31 22:05:22,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:05:22,230 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 90 flow [2024-10-31 22:05:22,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-10-31 22:05:22,233 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-10-31 22:05:22,233 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 90 flow [2024-10-31 22:05:22,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:22,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:22,234 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, 1, 1] [2024-10-31 22:05:22,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:05:22,234 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:05:22,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash 859726172, now seen corresponding path program 1 times [2024-10-31 22:05:22,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:22,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648087719] [2024-10-31 22:05:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:22,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648087719] [2024-10-31 22:05:22,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648087719] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:22,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:22,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:05:22,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069776699] [2024-10-31 22:05:22,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:22,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:05:22,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:22,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:05:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:05:22,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-31 22:05:22,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-10-31 22:05:22,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:22,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-31 22:05:22,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:22,500 INFO L124 PetriNetUnfolderBase]: 250/472 cut-off events. [2024-10-31 22:05:22,501 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-31 22:05:22,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 472 events. 250/472 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2061 event pairs, 102 based on Foata normal form. 11/450 useless extension candidates. Maximal degree in co-relation 1022. Up to 314 conditions per place. [2024-10-31 22:05:22,505 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 32 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2024-10-31 22:05:22,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 201 flow [2024-10-31 22:05:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:05:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:05:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-10-31 22:05:22,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2024-10-31 22:05:22,507 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 90 flow. Second operand 3 states and 59 transitions. [2024-10-31 22:05:22,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 201 flow [2024-10-31 22:05:22,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:05:22,509 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 100 flow [2024-10-31 22:05:22,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-10-31 22:05:22,513 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2024-10-31 22:05:22,513 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 100 flow [2024-10-31 22:05:22,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-10-31 22:05:22,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:22,514 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, 1, 1, 1, 1] [2024-10-31 22:05:22,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:05:22,514 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:05:22,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2141843345, now seen corresponding path program 1 times [2024-10-31 22:05:22,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:22,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757805665] [2024-10-31 22:05:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:22,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:22,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:22,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757805665] [2024-10-31 22:05:22,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757805665] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:22,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:22,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:05:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270586338] [2024-10-31 22:05:22,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:22,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:05:22,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:05:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:22,721 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-31 22:05:22,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2024-10-31 22:05:22,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:22,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-31 22:05:22,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:22,869 INFO L124 PetriNetUnfolderBase]: 307/599 cut-off events. [2024-10-31 22:05:22,869 INFO L125 PetriNetUnfolderBase]: For 73/80 co-relation queries the response was YES. [2024-10-31 22:05:22,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 599 events. 307/599 cut-off events. For 73/80 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2846 event pairs, 247 based on Foata normal form. 12/564 useless extension candidates. Maximal degree in co-relation 1079. Up to 433 conditions per place. [2024-10-31 22:05:22,873 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 25 selfloop transitions, 2 changer transitions 17/50 dead transitions. [2024-10-31 22:05:22,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 242 flow [2024-10-31 22:05:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:05:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:05:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-10-31 22:05:22,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5725806451612904 [2024-10-31 22:05:22,875 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 100 flow. Second operand 4 states and 71 transitions. [2024-10-31 22:05:22,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 242 flow [2024-10-31 22:05:22,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:05:22,878 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 112 flow [2024-10-31 22:05:22,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-10-31 22:05:22,879 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-10-31 22:05:22,879 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 112 flow [2024-10-31 22:05:22,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2024-10-31 22:05:22,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:22,880 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, 1, 1, 1, 1, 1] [2024-10-31 22:05:22,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:05:22,880 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:05:22,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash 812735461, now seen corresponding path program 1 times [2024-10-31 22:05:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:22,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941878052] [2024-10-31 22:05:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:22,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:24,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:24,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941878052] [2024-10-31 22:05:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941878052] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135141614] [2024-10-31 22:05:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:24,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:24,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:24,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:24,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:05:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:24,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-31 22:05:24,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:24,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:05:24,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-31 22:05:24,722 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:05:24,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:05:24,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:05:25,555 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-10-31 22:05:25,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-10-31 22:05:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:25,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:05:27,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:05:27,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-10-31 22:05:27,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:05:27,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2024-10-31 22:05:27,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:05:27,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2024-10-31 22:05:27,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:05:27,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2024-10-31 22:05:27,383 INFO L349 Elim1Store]: treesize reduction 9, result has 80.9 percent of original size [2024-10-31 22:05:27,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 181 [2024-10-31 22:05:27,427 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-31 22:05:27,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:05:27,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 120 [2024-10-31 22:05:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:27,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135141614] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:05:27,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:05:27,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 13] total 32 [2024-10-31 22:05:27,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199849270] [2024-10-31 22:05:27,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:05:27,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-31 22:05:27,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-31 22:05:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=836, Unknown=3, NotChecked=0, Total=1056 [2024-10-31 22:05:28,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-10-31 22:05:28,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 112 flow. Second operand has 33 states, 33 states have (on average 7.151515151515151) internal successors, (236), 33 states have internal predecessors, (236), 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) [2024-10-31 22:05:28,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:28,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-10-31 22:05:28,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:32,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-31 22:05:42,661 INFO L124 PetriNetUnfolderBase]: 1339/2271 cut-off events. [2024-10-31 22:05:42,662 INFO L125 PetriNetUnfolderBase]: For 382/382 co-relation queries the response was YES. [2024-10-31 22:05:42,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5374 conditions, 2271 events. 1339/2271 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10635 event pairs, 231 based on Foata normal form. 4/1987 useless extension candidates. Maximal degree in co-relation 5356. Up to 403 conditions per place. [2024-10-31 22:05:42,675 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 198 selfloop transitions, 94 changer transitions 75/370 dead transitions. [2024-10-31 22:05:42,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 370 transitions, 1802 flow [2024-10-31 22:05:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-31 22:05:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-10-31 22:05:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 605 transitions. [2024-10-31 22:05:42,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-10-31 22:05:42,680 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 112 flow. Second operand 50 states and 605 transitions. [2024-10-31 22:05:42,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 370 transitions, 1802 flow [2024-10-31 22:05:42,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 370 transitions, 1790 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-31 22:05:42,689 INFO L231 Difference]: Finished difference. Result has 122 places, 126 transitions, 886 flow [2024-10-31 22:05:42,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=886, PETRI_PLACES=122, PETRI_TRANSITIONS=126} [2024-10-31 22:05:42,691 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-10-31 22:05:42,691 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 126 transitions, 886 flow [2024-10-31 22:05:42,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.151515151515151) internal successors, (236), 33 states have internal predecessors, (236), 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) [2024-10-31 22:05:42,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:42,692 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:42,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:05:42,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:42,897 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:05:42,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:42,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1742349785, now seen corresponding path program 2 times [2024-10-31 22:05:42,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:42,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361141527] [2024-10-31 22:05:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:42,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:44,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:44,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361141527] [2024-10-31 22:05:44,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361141527] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:44,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346682976] [2024-10-31 22:05:44,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:05:44,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:44,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:44,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:44,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee98059-195d-48ef-a803-02f285a2c9a2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:05:45,018 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:05:45,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:05:45,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 22:05:45,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:45,937 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-10-31 22:05:45,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-10-31 22:05:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:05:45,998 INFO L311 TraceCheckSpWp]: Computing backward predicates...