./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:56:49,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:56:49,456 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:56:49,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:56:49,469 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:56:49,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:56:49,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:56:49,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:56:49,507 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:56:49,507 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:56:49,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:56:49,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:56:49,509 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:56:49,510 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:56:49,511 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:56:49,511 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:56:49,511 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:56:49,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:56:49,512 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:56:49,513 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:56:49,513 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:56:49,513 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:56:49,513 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:56:49,513 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:56:49,514 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:56:49,514 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:56:49,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:56:49,515 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:56:49,515 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:56:49,515 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:56:49,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:56:49,515 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2024-11-23 23:56:49,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:56:49,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:56:49,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:56:49,852 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:56:49,853 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:56:49,854 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-23 23:56:52,814 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/data/ee0102a12/dc81e097471442f0a2fb0e43415117ed/FLAG2abc8299a [2024-11-23 23:56:53,048 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:56:53,049 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-23 23:56:53,058 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/data/ee0102a12/dc81e097471442f0a2fb0e43415117ed/FLAG2abc8299a [2024-11-23 23:56:53,075 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/data/ee0102a12/dc81e097471442f0a2fb0e43415117ed [2024-11-23 23:56:53,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:56:53,080 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:56:53,082 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:56:53,082 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:56:53,088 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:56:53,089 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c9f6d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53, skipping insertion in model container [2024-11-23 23:56:53,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,114 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:56:53,299 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:56:53,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:56:53,320 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:56:53,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:56:53,367 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:56:53,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53 WrapperNode [2024-11-23 23:56:53,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:56:53,369 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:56:53,369 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:56:53,369 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:56:53,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,414 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 270 [2024-11-23 23:56:53,414 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:56:53,415 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:56:53,415 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:56:53,415 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:56:53,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,428 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,446 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-23 23:56:53,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,446 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,457 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,459 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,463 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:56:53,471 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:56:53,471 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:56:53,471 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:56:53,472 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (1/1) ... [2024-11-23 23:56:53,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:56:53,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:53,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:56:53,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:56:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:56:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:56:53,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:56:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:56:53,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:56:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:56:53,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:56:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:56:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:56:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:56:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:56:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:56:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:56:53,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:56:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:56:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:56:53,548 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:56:53,724 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:56:53,727 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:56:54,512 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:56:54,513 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:56:55,018 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:56:55,019 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:56:55,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:56:55 BoogieIcfgContainer [2024-11-23 23:56:55,019 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:56:55,024 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:56:55,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:56:55,029 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:56:55,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:56:53" (1/3) ... [2024-11-23 23:56:55,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ee00e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:56:55, skipping insertion in model container [2024-11-23 23:56:55,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:53" (2/3) ... [2024-11-23 23:56:55,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ee00e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:56:55, skipping insertion in model container [2024-11-23 23:56:55,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:56:55" (3/3) ... [2024-11-23 23:56:55,032 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2024-11-23 23:56:55,051 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:56:55,053 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-subst.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 6 loop locations, and 32 error locations. [2024-11-23 23:56:55,053 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:56:55,166 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:56:55,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 195 flow [2024-11-23 23:56:55,286 INFO L124 PetriNetUnfolderBase]: 9/84 cut-off events. [2024-11-23 23:56:55,288 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:56:55,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 9/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 278 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-11-23 23:56:55,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 195 flow [2024-11-23 23:56:55,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 184 flow [2024-11-23 23:56:55,316 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:56:55,335 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=None, 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;@6a1b19d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:56:55,335 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-23 23:56:55,341 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:56:55,342 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:56:55,342 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:56:55,342 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:55,343 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:56:55,343 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:56:55,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash 884684, now seen corresponding path program 1 times [2024-11-23 23:56:55,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:55,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819277721] [2024-11-23 23:56:55,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:55,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:55,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:55,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819277721] [2024-11-23 23:56:55,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819277721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:56:55,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:56:55,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:56:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803164284] [2024-11-23 23:56:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:55,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:56:55,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:55,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:56:55,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:56:55,803 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:56:55,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:55,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:55,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:56:55,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:56,276 INFO L124 PetriNetUnfolderBase]: 977/1702 cut-off events. [2024-11-23 23:56:56,277 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-23 23:56:56,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 1702 events. 977/1702 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9519 event pairs, 608 based on Foata normal form. 1/1204 useless extension candidates. Maximal degree in co-relation 2866. Up to 1318 conditions per place. [2024-11-23 23:56:56,306 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 36 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-23 23:56:56,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 250 flow [2024-11-23 23:56:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:56:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:56:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2024-11-23 23:56:56,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-23 23:56:56,326 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 184 flow. Second operand 3 states and 174 transitions. [2024-11-23 23:56:56,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 250 flow [2024-11-23 23:56:56,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 238 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:56:56,341 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-23 23:56:56,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-23 23:56:56,347 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2024-11-23 23:56:56,347 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-23 23:56:56,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:56,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:56,348 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:56:56,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:56:56,348 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:56:56,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash 884685, now seen corresponding path program 1 times [2024-11-23 23:56:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400957141] [2024-11-23 23:56:56,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:56,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400957141] [2024-11-23 23:56:56,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400957141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:56:56,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:56:56,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:56:56,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449774518] [2024-11-23 23:56:56,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:56,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:56:56,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:56,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:56:56,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:56:56,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:56:56,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:56,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:56,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:56:56,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:57,350 INFO L124 PetriNetUnfolderBase]: 978/1705 cut-off events. [2024-11-23 23:56:57,350 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-23 23:56:57,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 1705 events. 978/1705 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9518 event pairs, 608 based on Foata normal form. 0/1203 useless extension candidates. Maximal degree in co-relation 3036. Up to 1331 conditions per place. [2024-11-23 23:56:57,365 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 40 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2024-11-23 23:56:57,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 260 flow [2024-11-23 23:56:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:56:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:56:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-11-23 23:56:57,367 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6350574712643678 [2024-11-23 23:56:57,367 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 4 states and 221 transitions. [2024-11-23 23:56:57,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 260 flow [2024-11-23 23:56:57,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:56:57,371 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 189 flow [2024-11-23 23:56:57,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-11-23 23:56:57,372 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2024-11-23 23:56:57,372 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 189 flow [2024-11-23 23:56:57,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:57,373 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:57,373 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-23 23:56:57,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:56:57,374 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:56:57,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:57,374 INFO L85 PathProgramCache]: Analyzing trace with hash 27426407, now seen corresponding path program 1 times [2024-11-23 23:56:57,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:57,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358962314] [2024-11-23 23:56:57,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:57,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:57,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:57,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358962314] [2024-11-23 23:56:57,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358962314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:56:57,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:56:57,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:56:57,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84690453] [2024-11-23 23:56:57,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:57,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:56:57,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:57,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:56:57,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:56:57,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:56:57,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:57,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:57,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:56:57,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:58,321 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2024-11-23 23:56:58,321 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-23 23:56:58,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3090 conditions, 1708 events. 979/1708 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9544 event pairs, 608 based on Foata normal form. 0/1205 useless extension candidates. Maximal degree in co-relation 3065. Up to 1330 conditions per place. [2024-11-23 23:56:58,338 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-23 23:56:58,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 289 flow [2024-11-23 23:56:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:56:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:56:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-23 23:56:58,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6160919540229886 [2024-11-23 23:56:58,341 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 189 flow. Second operand 5 states and 268 transitions. [2024-11-23 23:56:58,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 289 flow [2024-11-23 23:56:58,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:56:58,344 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 223 flow [2024-11-23 23:56:58,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-11-23 23:56:58,345 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-23 23:56:58,345 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 223 flow [2024-11-23 23:56:58,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:58,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:58,346 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 23:56:58,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:56:58,346 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:56:58,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash 850211680, now seen corresponding path program 1 times [2024-11-23 23:56:58,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:58,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332066547] [2024-11-23 23:56:58,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:58,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:58,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332066547] [2024-11-23 23:56:58,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332066547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:58,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167642974] [2024-11-23 23:56:58,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:58,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:58,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:58,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:58,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:56:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:58,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:56:58,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:58,912 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 10 treesize of output 9 [2024-11-23 23:56:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:59,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:59,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167642974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:59,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:59,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 23:56:59,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080303799] [2024-11-23 23:56:59,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:59,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:56:59,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:59,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:56:59,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:57:00,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:57:00,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 223 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:00,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:00,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:57:00,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:00,729 INFO L124 PetriNetUnfolderBase]: 980/1710 cut-off events. [2024-11-23 23:57:00,729 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-23 23:57:00,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 1710 events. 980/1710 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9547 event pairs, 608 based on Foata normal form. 0/1210 useless extension candidates. Maximal degree in co-relation 3075. Up to 1329 conditions per place. [2024-11-23 23:57:00,744 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-11-23 23:57:00,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 332 flow [2024-11-23 23:57:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:57:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:57:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 444 transitions. [2024-11-23 23:57:00,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5670498084291188 [2024-11-23 23:57:00,749 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 223 flow. Second operand 9 states and 444 transitions. [2024-11-23 23:57:00,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 332 flow [2024-11-23 23:57:00,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:00,753 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 257 flow [2024-11-23 23:57:00,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=257, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2024-11-23 23:57:00,755 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 5 predicate places. [2024-11-23 23:57:00,756 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 257 flow [2024-11-23 23:57:00,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:00,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:00,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 23:57:00,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:57:00,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:00,962 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:00,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:00,962 INFO L85 PathProgramCache]: Analyzing trace with hash 850221655, now seen corresponding path program 1 times [2024-11-23 23:57:00,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:00,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580548711] [2024-11-23 23:57:00,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:00,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:01,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:01,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580548711] [2024-11-23 23:57:01,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580548711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:01,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:01,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:57:01,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912530418] [2024-11-23 23:57:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:01,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:01,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:01,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:01,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:01,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:57:01,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:01,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:01,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:57:01,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:01,856 INFO L124 PetriNetUnfolderBase]: 981/1713 cut-off events. [2024-11-23 23:57:01,856 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-23 23:57:01,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 1713 events. 981/1713 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9541 event pairs, 608 based on Foata normal form. 1/1215 useless extension candidates. Maximal degree in co-relation 3085. Up to 1335 conditions per place. [2024-11-23 23:57:01,871 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 43 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-11-23 23:57:01,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 367 flow [2024-11-23 23:57:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-23 23:57:01,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-11-23 23:57:01,873 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 257 flow. Second operand 5 states and 267 transitions. [2024-11-23 23:57:01,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 367 flow [2024-11-23 23:57:01,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 318 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-23 23:57:01,876 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 251 flow [2024-11-23 23:57:01,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-11-23 23:57:01,877 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2024-11-23 23:57:01,878 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 251 flow [2024-11-23 23:57:01,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:01,878 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:01,878 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 23:57:01,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 23:57:01,879 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:01,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash 587001648, now seen corresponding path program 1 times [2024-11-23 23:57:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:01,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033502821] [2024-11-23 23:57:01,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:01,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:02,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:02,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033502821] [2024-11-23 23:57:02,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033502821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:02,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341273068] [2024-11-23 23:57:02,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:02,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:02,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:02,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:57:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:02,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:57:02,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:02,291 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 10 treesize of output 9 [2024-11-23 23:57:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:02,548 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:02,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341273068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:02,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:02,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 23:57:02,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059133008] [2024-11-23 23:57:02,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:02,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:57:02,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:02,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:57:02,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:57:04,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 87 [2024-11-23 23:57:04,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 251 flow. Second operand has 13 states, 13 states have (on average 44.30769230769231) internal successors, (576), 13 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:04,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:04,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 87 [2024-11-23 23:57:04,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:04,975 INFO L124 PetriNetUnfolderBase]: 1151/2028 cut-off events. [2024-11-23 23:57:04,975 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-23 23:57:04,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3682 conditions, 2028 events. 1151/2028 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11716 event pairs, 733 based on Foata normal form. 0/1381 useless extension candidates. Maximal degree in co-relation 3629. Up to 1557 conditions per place. [2024-11-23 23:57:04,995 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 37 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-11-23 23:57:04,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 371 flow [2024-11-23 23:57:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:57:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:57:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 441 transitions. [2024-11-23 23:57:05,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-11-23 23:57:05,000 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 251 flow. Second operand 9 states and 441 transitions. [2024-11-23 23:57:05,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 371 flow [2024-11-23 23:57:05,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 91 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:05,005 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 289 flow [2024-11-23 23:57:05,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2024-11-23 23:57:05,008 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 8 predicate places. [2024-11-23 23:57:05,008 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 289 flow [2024-11-23 23:57:05,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 44.30769230769231) internal successors, (576), 13 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:05,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:05,009 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-23 23:57:05,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:57:05,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:05,210 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:05,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:05,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1019253975, now seen corresponding path program 1 times [2024-11-23 23:57:05,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:05,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921988022] [2024-11-23 23:57:05,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:05,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:05,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:05,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921988022] [2024-11-23 23:57:05,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921988022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:05,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109447661] [2024-11-23 23:57:05,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:05,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:05,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:05,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:05,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:57:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:05,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 23:57:05,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:05,662 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 10 treesize of output 9 [2024-11-23 23:57:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:05,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:06,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109447661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:06,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:06,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 23:57:06,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203456048] [2024-11-23 23:57:06,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:06,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:57:06,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:06,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:57:06,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:57:07,220 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:57:07,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 289 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:07,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:07,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:57:07,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:07,847 INFO L124 PetriNetUnfolderBase]: 983/1717 cut-off events. [2024-11-23 23:57:07,847 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-23 23:57:07,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3151 conditions, 1717 events. 983/1717 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9545 event pairs, 608 based on Foata normal form. 0/1219 useless extension candidates. Maximal degree in co-relation 3087. Up to 1328 conditions per place. [2024-11-23 23:57:07,860 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 34 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-11-23 23:57:07,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 408 flow [2024-11-23 23:57:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:57:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:57:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 448 transitions. [2024-11-23 23:57:07,866 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5721583652618135 [2024-11-23 23:57:07,866 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 289 flow. Second operand 9 states and 448 transitions. [2024-11-23 23:57:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 408 flow [2024-11-23 23:57:07,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 375 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-23 23:57:07,869 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 307 flow [2024-11-23 23:57:07,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=307, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2024-11-23 23:57:07,871 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-11-23 23:57:07,873 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 307 flow [2024-11-23 23:57:07,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:07,874 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:07,874 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:07,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:57:08,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:08,075 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:08,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1536754488, now seen corresponding path program 1 times [2024-11-23 23:57:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652622921] [2024-11-23 23:57:08,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:08,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:08,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652622921] [2024-11-23 23:57:08,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652622921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:08,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:08,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:57:08,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774076125] [2024-11-23 23:57:08,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:08,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:08,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:08,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:08,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:08,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:57:08,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:08,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:08,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:57:08,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:08,693 INFO L124 PetriNetUnfolderBase]: 1838/3082 cut-off events. [2024-11-23 23:57:08,693 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-23 23:57:08,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5795 conditions, 3082 events. 1838/3082 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18516 event pairs, 797 based on Foata normal form. 0/2260 useless extension candidates. Maximal degree in co-relation 3647. Up to 1573 conditions per place. [2024-11-23 23:57:08,716 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 108 selfloop transitions, 9 changer transitions 0/153 dead transitions. [2024-11-23 23:57:08,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 737 flow [2024-11-23 23:57:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:57:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:57:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 373 transitions. [2024-11-23 23:57:08,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7145593869731801 [2024-11-23 23:57:08,718 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 307 flow. Second operand 6 states and 373 transitions. [2024-11-23 23:57:08,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 737 flow [2024-11-23 23:57:08,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 153 transitions, 659 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-23 23:57:08,725 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 329 flow [2024-11-23 23:57:08,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-11-23 23:57:08,726 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2024-11-23 23:57:08,727 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 329 flow [2024-11-23 23:57:08,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:08,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:08,727 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:08,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 23:57:08,729 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:08,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:08,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1655280517, now seen corresponding path program 1 times [2024-11-23 23:57:08,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:08,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224422451] [2024-11-23 23:57:08,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:08,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:08,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:08,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224422451] [2024-11-23 23:57:08,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224422451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:08,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:08,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:57:08,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714019820] [2024-11-23 23:57:08,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:08,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:08,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:08,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:08,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:08,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:57:08,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:08,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:08,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:57:08,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:09,567 INFO L124 PetriNetUnfolderBase]: 3204/5372 cut-off events. [2024-11-23 23:57:09,568 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2024-11-23 23:57:09,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10506 conditions, 5372 events. 3204/5372 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35122 event pairs, 1344 based on Foata normal form. 62/4134 useless extension candidates. Maximal degree in co-relation 5911. Up to 2548 conditions per place. [2024-11-23 23:57:09,606 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 109 selfloop transitions, 8 changer transitions 0/153 dead transitions. [2024-11-23 23:57:09,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 715 flow [2024-11-23 23:57:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 318 transitions. [2024-11-23 23:57:09,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7310344827586207 [2024-11-23 23:57:09,608 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 329 flow. Second operand 5 states and 318 transitions. [2024-11-23 23:57:09,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 715 flow [2024-11-23 23:57:09,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 153 transitions, 710 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:09,615 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 361 flow [2024-11-23 23:57:09,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2024-11-23 23:57:09,618 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2024-11-23 23:57:09,619 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 361 flow [2024-11-23 23:57:09,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:09,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:09,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:09,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 23:57:09,621 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:09,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash -714376663, now seen corresponding path program 1 times [2024-11-23 23:57:09,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:09,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818255704] [2024-11-23 23:57:09,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:09,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:09,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:09,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818255704] [2024-11-23 23:57:09,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818255704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:09,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:09,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:57:09,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485155566] [2024-11-23 23:57:09,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:09,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:09,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:09,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:09,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:09,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:57:09,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:09,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:09,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:57:09,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:10,429 INFO L124 PetriNetUnfolderBase]: 2878/5237 cut-off events. [2024-11-23 23:57:10,429 INFO L125 PetriNetUnfolderBase]: For 1536/1536 co-relation queries the response was YES. [2024-11-23 23:57:10,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10295 conditions, 5237 events. 2878/5237 cut-off events. For 1536/1536 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36722 event pairs, 1484 based on Foata normal form. 0/3775 useless extension candidates. Maximal degree in co-relation 6459. Up to 2731 conditions per place. [2024-11-23 23:57:10,462 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 104 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2024-11-23 23:57:10,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 149 transitions, 733 flow [2024-11-23 23:57:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:57:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:57:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2024-11-23 23:57:10,464 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-23 23:57:10,464 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 361 flow. Second operand 6 states and 366 transitions. [2024-11-23 23:57:10,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 149 transitions, 733 flow [2024-11-23 23:57:10,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 149 transitions, 728 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:10,469 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 387 flow [2024-11-23 23:57:10,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-11-23 23:57:10,470 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2024-11-23 23:57:10,470 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 387 flow [2024-11-23 23:57:10,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:10,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:10,471 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:10,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:57:10,471 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:10,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash 585769741, now seen corresponding path program 1 times [2024-11-23 23:57:10,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:10,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728590067] [2024-11-23 23:57:10,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:10,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:10,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728590067] [2024-11-23 23:57:10,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728590067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:10,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:10,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:57:10,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038849870] [2024-11-23 23:57:10,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:10,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:10,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:10,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:10,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:57:10,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:10,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:10,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:57:10,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:11,204 INFO L124 PetriNetUnfolderBase]: 2458/5096 cut-off events. [2024-11-23 23:57:11,204 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2024-11-23 23:57:11,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9925 conditions, 5096 events. 2458/5096 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39303 event pairs, 1378 based on Foata normal form. 0/3673 useless extension candidates. Maximal degree in co-relation 6276. Up to 2357 conditions per place. [2024-11-23 23:57:11,237 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 106 selfloop transitions, 7 changer transitions 0/149 dead transitions. [2024-11-23 23:57:11,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 149 transitions, 777 flow [2024-11-23 23:57:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 310 transitions. [2024-11-23 23:57:11,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7126436781609196 [2024-11-23 23:57:11,239 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 387 flow. Second operand 5 states and 310 transitions. [2024-11-23 23:57:11,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 149 transitions, 777 flow [2024-11-23 23:57:11,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 149 transitions, 764 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:57:11,245 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 399 flow [2024-11-23 23:57:11,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-11-23 23:57:11,245 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 24 predicate places. [2024-11-23 23:57:11,246 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 399 flow [2024-11-23 23:57:11,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:11,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:11,246 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:11,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 23:57:11,246 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:11,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1519987510, now seen corresponding path program 1 times [2024-11-23 23:57:11,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:11,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070952231] [2024-11-23 23:57:11,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:11,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:11,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:11,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070952231] [2024-11-23 23:57:11,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070952231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:11,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:11,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:57:11,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930522808] [2024-11-23 23:57:11,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:11,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:11,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:11,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:11,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:11,420 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:57:11,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:11,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:11,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:57:11,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:12,445 INFO L124 PetriNetUnfolderBase]: 4218/8258 cut-off events. [2024-11-23 23:57:12,446 INFO L125 PetriNetUnfolderBase]: For 4104/4104 co-relation queries the response was YES. [2024-11-23 23:57:12,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17396 conditions, 8258 events. 4218/8258 cut-off events. For 4104/4104 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 66163 event pairs, 2131 based on Foata normal form. 109/6570 useless extension candidates. Maximal degree in co-relation 10196. Up to 3627 conditions per place. [2024-11-23 23:57:12,503 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 106 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-11-23 23:57:12,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 153 transitions, 807 flow [2024-11-23 23:57:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2024-11-23 23:57:12,505 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7218390804597701 [2024-11-23 23:57:12,505 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 399 flow. Second operand 5 states and 314 transitions. [2024-11-23 23:57:12,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 153 transitions, 807 flow [2024-11-23 23:57:12,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 153 transitions, 796 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:12,518 INFO L231 Difference]: Finished difference. Result has 112 places, 105 transitions, 432 flow [2024-11-23 23:57:12,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=112, PETRI_TRANSITIONS=105} [2024-11-23 23:57:12,519 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 28 predicate places. [2024-11-23 23:57:12,519 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 105 transitions, 432 flow [2024-11-23 23:57:12,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:12,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:12,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:12,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 23:57:12,520 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:12,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash -92694387, now seen corresponding path program 1 times [2024-11-23 23:57:12,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:12,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997964220] [2024-11-23 23:57:12,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:57:12,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:12,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997964220] [2024-11-23 23:57:12,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997964220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:12,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:12,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:57:12,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186687581] [2024-11-23 23:57:12,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:12,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:57:12,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:12,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:57:12,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:57:12,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-23 23:57:12,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 105 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:12,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:12,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-23 23:57:12,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:13,842 INFO L124 PetriNetUnfolderBase]: 5171/10714 cut-off events. [2024-11-23 23:57:13,842 INFO L125 PetriNetUnfolderBase]: For 6191/6191 co-relation queries the response was YES. [2024-11-23 23:57:13,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22162 conditions, 10714 events. 5171/10714 cut-off events. For 6191/6191 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 93388 event pairs, 4137 based on Foata normal form. 0/8347 useless extension candidates. Maximal degree in co-relation 12348. Up to 7536 conditions per place. [2024-11-23 23:57:13,925 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 64 selfloop transitions, 8 changer transitions 0/101 dead transitions. [2024-11-23 23:57:13,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 101 transitions, 568 flow [2024-11-23 23:57:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-23 23:57:13,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5195402298850574 [2024-11-23 23:57:13,927 INFO L175 Difference]: Start difference. First operand has 112 places, 105 transitions, 432 flow. Second operand 5 states and 226 transitions. [2024-11-23 23:57:13,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 101 transitions, 568 flow [2024-11-23 23:57:13,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 101 transitions, 561 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:13,942 INFO L231 Difference]: Finished difference. Result has 111 places, 101 transitions, 433 flow [2024-11-23 23:57:13,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=433, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2024-11-23 23:57:13,943 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2024-11-23 23:57:13,943 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 433 flow [2024-11-23 23:57:13,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:13,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:13,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:13,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:57:13,944 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:13,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash -92694386, now seen corresponding path program 1 times [2024-11-23 23:57:13,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:13,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079334159] [2024-11-23 23:57:13,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:13,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:14,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:14,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079334159] [2024-11-23 23:57:14,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079334159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:14,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889195805] [2024-11-23 23:57:14,414 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:14,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:14,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:14,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:14,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:57:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:14,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-23 23:57:14,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:14,534 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 [2024-11-23 23:57:14,628 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 23:57:14,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 23:57:14,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 23:57:14,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:14,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 23:57:14,700 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:57:14,700 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 [2024-11-23 23:57:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:14,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:15,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2024-11-23 23:57:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:15,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889195805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:15,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:15,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-23 23:57:15,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347131032] [2024-11-23 23:57:15,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:15,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:57:15,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:15,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:57:15,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:57:17,720 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2024-11-23 23:57:17,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 433 flow. Second operand has 16 states, 16 states have (on average 35.9375) internal successors, (575), 16 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:17,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:17,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2024-11-23 23:57:17,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:19,466 INFO L124 PetriNetUnfolderBase]: 8542/15830 cut-off events. [2024-11-23 23:57:19,466 INFO L125 PetriNetUnfolderBase]: For 7486/7486 co-relation queries the response was YES. [2024-11-23 23:57:19,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33004 conditions, 15830 events. 8542/15830 cut-off events. For 7486/7486 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 129998 event pairs, 3048 based on Foata normal form. 0/12671 useless extension candidates. Maximal degree in co-relation 21623. Up to 4443 conditions per place. [2024-11-23 23:57:19,574 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 141 selfloop transitions, 23 changer transitions 0/191 dead transitions. [2024-11-23 23:57:19,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 191 transitions, 1026 flow [2024-11-23 23:57:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:57:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:57:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 449 transitions. [2024-11-23 23:57:19,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5734355044699873 [2024-11-23 23:57:19,576 INFO L175 Difference]: Start difference. First operand has 111 places, 101 transitions, 433 flow. Second operand 9 states and 449 transitions. [2024-11-23 23:57:19,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 191 transitions, 1026 flow [2024-11-23 23:57:19,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 191 transitions, 1012 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:57:19,594 INFO L231 Difference]: Finished difference. Result has 117 places, 104 transitions, 492 flow [2024-11-23 23:57:19,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=492, PETRI_PLACES=117, PETRI_TRANSITIONS=104} [2024-11-23 23:57:19,595 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2024-11-23 23:57:19,595 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 104 transitions, 492 flow [2024-11-23 23:57:19,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 35.9375) internal successors, (575), 16 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:19,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:19,595 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:19,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:57:19,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:19,796 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:19,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:19,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1421442180, now seen corresponding path program 1 times [2024-11-23 23:57:19,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:19,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608768330] [2024-11-23 23:57:19,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:19,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:57:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608768330] [2024-11-23 23:57:19,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608768330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:19,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:19,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:57:19,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996033823] [2024-11-23 23:57:19,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:19,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:57:19,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:19,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:57:19,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:57:20,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2024-11-23 23:57:20,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 104 transitions, 492 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:20,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:20,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2024-11-23 23:57:20,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:21,364 INFO L124 PetriNetUnfolderBase]: 8055/14870 cut-off events. [2024-11-23 23:57:21,364 INFO L125 PetriNetUnfolderBase]: For 10568/10568 co-relation queries the response was YES. [2024-11-23 23:57:21,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32988 conditions, 14870 events. 8055/14870 cut-off events. For 10568/10568 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 119241 event pairs, 6517 based on Foata normal form. 0/13152 useless extension candidates. Maximal degree in co-relation 22359. Up to 11626 conditions per place. [2024-11-23 23:57:21,508 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 62 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2024-11-23 23:57:21,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 100 transitions, 632 flow [2024-11-23 23:57:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-11-23 23:57:21,510 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2024-11-23 23:57:21,510 INFO L175 Difference]: Start difference. First operand has 117 places, 104 transitions, 492 flow. Second operand 5 states and 230 transitions. [2024-11-23 23:57:21,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 100 transitions, 632 flow [2024-11-23 23:57:21,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 100 transitions, 594 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-23 23:57:21,532 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 470 flow [2024-11-23 23:57:21,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=470, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2024-11-23 23:57:21,532 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2024-11-23 23:57:21,533 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 470 flow [2024-11-23 23:57:21,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:21,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:21,533 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:21,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 23:57:21,533 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:21,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:21,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1421442181, now seen corresponding path program 1 times [2024-11-23 23:57:21,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:21,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510012420] [2024-11-23 23:57:21,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:21,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:21,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:21,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510012420] [2024-11-23 23:57:21,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510012420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:21,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182737487] [2024-11-23 23:57:21,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:21,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:21,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:21,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:21,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:57:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:21,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:57:21,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:21,956 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 [2024-11-23 23:57:22,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:22,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 23:57:22,031 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:57:22,031 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 [2024-11-23 23:57:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:22,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:22,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-23 23:57:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:22,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182737487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:22,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:22,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:57:22,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410739883] [2024-11-23 23:57:22,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:22,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:57:22,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:22,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:57:22,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:57:23,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 87 [2024-11-23 23:57:23,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 100 transitions, 470 flow. Second operand has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:23,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:23,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 87 [2024-11-23 23:57:23,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:24,986 INFO L124 PetriNetUnfolderBase]: 6724/11535 cut-off events. [2024-11-23 23:57:24,986 INFO L125 PetriNetUnfolderBase]: For 7941/7941 co-relation queries the response was YES. [2024-11-23 23:57:25,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26269 conditions, 11535 events. 6724/11535 cut-off events. For 7941/7941 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 82578 event pairs, 2535 based on Foata normal form. 0/9956 useless extension candidates. Maximal degree in co-relation 17411. Up to 3385 conditions per place. [2024-11-23 23:57:25,038 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 130 selfloop transitions, 31 changer transitions 0/187 dead transitions. [2024-11-23 23:57:25,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 187 transitions, 1112 flow [2024-11-23 23:57:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:57:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:57:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 498 transitions. [2024-11-23 23:57:25,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6360153256704981 [2024-11-23 23:57:25,040 INFO L175 Difference]: Start difference. First operand has 113 places, 100 transitions, 470 flow. Second operand 9 states and 498 transitions. [2024-11-23 23:57:25,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 187 transitions, 1112 flow [2024-11-23 23:57:25,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 187 transitions, 1088 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:57:25,056 INFO L231 Difference]: Finished difference. Result has 119 places, 108 transitions, 600 flow [2024-11-23 23:57:25,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=600, PETRI_PLACES=119, PETRI_TRANSITIONS=108} [2024-11-23 23:57:25,057 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 35 predicate places. [2024-11-23 23:57:25,059 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 108 transitions, 600 flow [2024-11-23 23:57:25,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:25,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:25,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:25,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 23:57:25,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 23:57:25,260 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:25,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1534084393, now seen corresponding path program 1 times [2024-11-23 23:57:25,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:25,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302340943] [2024-11-23 23:57:25,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:25,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302340943] [2024-11-23 23:57:25,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302340943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:25,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:25,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:57:25,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314879779] [2024-11-23 23:57:25,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:25,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:25,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:25,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:25,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:57:25,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 108 transitions, 600 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:25,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:25,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:57:25,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:26,493 INFO L124 PetriNetUnfolderBase]: 5708/10540 cut-off events. [2024-11-23 23:57:26,493 INFO L125 PetriNetUnfolderBase]: For 10915/11027 co-relation queries the response was YES. [2024-11-23 23:57:26,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24368 conditions, 10540 events. 5708/10540 cut-off events. For 10915/11027 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 78994 event pairs, 3414 based on Foata normal form. 140/8863 useless extension candidates. Maximal degree in co-relation 15479. Up to 5417 conditions per place. [2024-11-23 23:57:26,535 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 108 selfloop transitions, 15 changer transitions 0/151 dead transitions. [2024-11-23 23:57:26,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 151 transitions, 1056 flow [2024-11-23 23:57:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2024-11-23 23:57:26,538 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7057471264367816 [2024-11-23 23:57:26,538 INFO L175 Difference]: Start difference. First operand has 119 places, 108 transitions, 600 flow. Second operand 5 states and 307 transitions. [2024-11-23 23:57:26,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 151 transitions, 1056 flow [2024-11-23 23:57:26,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 151 transitions, 1026 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-23 23:57:26,549 INFO L231 Difference]: Finished difference. Result has 122 places, 110 transitions, 638 flow [2024-11-23 23:57:26,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=638, PETRI_PLACES=122, PETRI_TRANSITIONS=110} [2024-11-23 23:57:26,549 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 38 predicate places. [2024-11-23 23:57:26,549 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 110 transitions, 638 flow [2024-11-23 23:57:26,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:26,550 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:26,550 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:26,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-23 23:57:26,550 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:26,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash -482446986, now seen corresponding path program 1 times [2024-11-23 23:57:26,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:26,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765528219] [2024-11-23 23:57:26,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:26,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:26,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:26,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765528219] [2024-11-23 23:57:26,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765528219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:26,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670370650] [2024-11-23 23:57:26,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:26,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:26,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:26,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:26,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:57:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:27,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:57:27,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:27,016 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 [2024-11-23 23:57:27,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:27,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-23 23:57:27,076 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:57:27,077 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 [2024-11-23 23:57:27,097 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:57:27,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 14 treesize of output 13 [2024-11-23 23:57:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:27,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:27,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-23 23:57:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:27,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670370650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:27,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:27,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2024-11-23 23:57:27,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377987721] [2024-11-23 23:57:27,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:27,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 23:57:27,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:27,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 23:57:27,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:57:28,911 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 87 [2024-11-23 23:57:28,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 110 transitions, 638 flow. Second operand has 15 states, 15 states have (on average 37.2) internal successors, (558), 15 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:28,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:28,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 87 [2024-11-23 23:57:28,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:30,951 INFO L124 PetriNetUnfolderBase]: 12876/22385 cut-off events. [2024-11-23 23:57:30,952 INFO L125 PetriNetUnfolderBase]: For 18893/19093 co-relation queries the response was YES. [2024-11-23 23:57:31,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50702 conditions, 22385 events. 12876/22385 cut-off events. For 18893/19093 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 175069 event pairs, 5179 based on Foata normal form. 0/18896 useless extension candidates. Maximal degree in co-relation 36645. Up to 5291 conditions per place. [2024-11-23 23:57:31,118 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 155 selfloop transitions, 31 changer transitions 0/208 dead transitions. [2024-11-23 23:57:31,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 208 transitions, 1376 flow [2024-11-23 23:57:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:57:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 23:57:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 494 transitions. [2024-11-23 23:57:31,121 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678160919540229 [2024-11-23 23:57:31,121 INFO L175 Difference]: Start difference. First operand has 122 places, 110 transitions, 638 flow. Second operand 10 states and 494 transitions. [2024-11-23 23:57:31,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 208 transitions, 1376 flow [2024-11-23 23:57:31,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 208 transitions, 1352 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:31,159 INFO L231 Difference]: Finished difference. Result has 131 places, 112 transitions, 710 flow [2024-11-23 23:57:31,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=710, PETRI_PLACES=131, PETRI_TRANSITIONS=112} [2024-11-23 23:57:31,160 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 47 predicate places. [2024-11-23 23:57:31,160 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 112 transitions, 710 flow [2024-11-23 23:57:31,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.2) internal successors, (558), 15 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:31,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:31,160 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:31,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:57:31,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 23:57:31,361 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:31,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2070953810, now seen corresponding path program 1 times [2024-11-23 23:57:31,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:31,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376830992] [2024-11-23 23:57:31,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:31,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:31,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:31,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376830992] [2024-11-23 23:57:31,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376830992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:31,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:31,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:57:31,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303102309] [2024-11-23 23:57:31,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:31,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:57:31,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:31,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:57:31,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:57:31,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 87 [2024-11-23 23:57:31,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 112 transitions, 710 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:31,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:31,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 87 [2024-11-23 23:57:31,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:33,382 INFO L124 PetriNetUnfolderBase]: 10028/18235 cut-off events. [2024-11-23 23:57:33,383 INFO L125 PetriNetUnfolderBase]: For 18990/19322 co-relation queries the response was YES. [2024-11-23 23:57:33,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42897 conditions, 18235 events. 10028/18235 cut-off events. For 18990/19322 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 145066 event pairs, 8388 based on Foata normal form. 0/16961 useless extension candidates. Maximal degree in co-relation 29199. Up to 14506 conditions per place. [2024-11-23 23:57:33,512 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 72 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2024-11-23 23:57:33,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 108 transitions, 872 flow [2024-11-23 23:57:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:57:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:57:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-23 23:57:33,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-11-23 23:57:33,514 INFO L175 Difference]: Start difference. First operand has 131 places, 112 transitions, 710 flow. Second operand 4 states and 196 transitions. [2024-11-23 23:57:33,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 108 transitions, 872 flow [2024-11-23 23:57:33,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 108 transitions, 820 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-23 23:57:33,544 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 676 flow [2024-11-23 23:57:33,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=676, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2024-11-23 23:57:33,545 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 41 predicate places. [2024-11-23 23:57:33,545 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 676 flow [2024-11-23 23:57:33,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:33,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:33,545 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:33,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-23 23:57:33,546 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:33,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2070953809, now seen corresponding path program 1 times [2024-11-23 23:57:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:33,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880446209] [2024-11-23 23:57:33,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:33,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880446209] [2024-11-23 23:57:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880446209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958881344] [2024-11-23 23:57:33,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:33,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:33,763 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:33,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:57:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:33,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:57:33,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:33,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:34,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-23 23:57:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:34,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958881344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:34,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:34,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-23 23:57:34,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654066107] [2024-11-23 23:57:34,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:34,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:57:34,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:34,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:57:34,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:57:34,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:57:34,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 676 flow. Second operand has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:34,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:34,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:57:34,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:36,044 INFO L124 PetriNetUnfolderBase]: 9574/15624 cut-off events. [2024-11-23 23:57:36,045 INFO L125 PetriNetUnfolderBase]: For 16633/16945 co-relation queries the response was YES. [2024-11-23 23:57:36,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38549 conditions, 15624 events. 9574/15624 cut-off events. For 16633/16945 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 107256 event pairs, 3782 based on Foata normal form. 0/14416 useless extension candidates. Maximal degree in co-relation 27880. Up to 4486 conditions per place. [2024-11-23 23:57:36,142 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 130 selfloop transitions, 31 changer transitions 0/183 dead transitions. [2024-11-23 23:57:36,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 183 transitions, 1292 flow [2024-11-23 23:57:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:57:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:57:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 427 transitions. [2024-11-23 23:57:36,144 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-23 23:57:36,144 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 676 flow. Second operand 7 states and 427 transitions. [2024-11-23 23:57:36,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 183 transitions, 1292 flow [2024-11-23 23:57:36,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 183 transitions, 1278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:36,169 INFO L231 Difference]: Finished difference. Result has 130 places, 108 transitions, 744 flow [2024-11-23 23:57:36,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=130, PETRI_TRANSITIONS=108} [2024-11-23 23:57:36,170 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2024-11-23 23:57:36,170 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 108 transitions, 744 flow [2024-11-23 23:57:36,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:36,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:36,171 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:36,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:57:36,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:36,375 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:36,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash -791223785, now seen corresponding path program 1 times [2024-11-23 23:57:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549076835] [2024-11-23 23:57:36,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:36,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:36,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549076835] [2024-11-23 23:57:36,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549076835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:36,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007804842] [2024-11-23 23:57:36,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:36,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:36,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:36,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:36,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:57:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:36,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:57:36,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:36,721 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 [2024-11-23 23:57:36,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:36,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 23:57:36,783 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:57:36,783 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 [2024-11-23 23:57:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:36,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:36,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-23 23:57:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:37,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007804842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:37,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:37,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:57:37,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382528996] [2024-11-23 23:57:37,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:37,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:57:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:37,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:57:37,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:57:38,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 87 [2024-11-23 23:57:38,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 108 transitions, 744 flow. Second operand has 13 states, 13 states have (on average 42.69230769230769) internal successors, (555), 13 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:38,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:38,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 87 [2024-11-23 23:57:38,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:40,730 INFO L124 PetriNetUnfolderBase]: 16950/27999 cut-off events. [2024-11-23 23:57:40,730 INFO L125 PetriNetUnfolderBase]: For 35784/36912 co-relation queries the response was YES. [2024-11-23 23:57:40,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68858 conditions, 27999 events. 16950/27999 cut-off events. For 35784/36912 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 214368 event pairs, 5913 based on Foata normal form. 0/25782 useless extension candidates. Maximal degree in co-relation 54547. Up to 8395 conditions per place. [2024-11-23 23:57:40,897 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 136 selfloop transitions, 31 changer transitions 0/188 dead transitions. [2024-11-23 23:57:40,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 188 transitions, 1440 flow [2024-11-23 23:57:40,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:57:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:57:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 483 transitions. [2024-11-23 23:57:40,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2024-11-23 23:57:40,899 INFO L175 Difference]: Start difference. First operand has 130 places, 108 transitions, 744 flow. Second operand 9 states and 483 transitions. [2024-11-23 23:57:40,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 188 transitions, 1440 flow [2024-11-23 23:57:40,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 188 transitions, 1361 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-23 23:57:40,945 INFO L231 Difference]: Finished difference. Result has 133 places, 109 transitions, 769 flow [2024-11-23 23:57:40,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=133, PETRI_TRANSITIONS=109} [2024-11-23 23:57:40,945 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 49 predicate places. [2024-11-23 23:57:40,945 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 109 transitions, 769 flow [2024-11-23 23:57:40,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.69230769230769) internal successors, (555), 13 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:40,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:40,946 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:40,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 23:57:41,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:41,146 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:41,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2102291604, now seen corresponding path program 1 times [2024-11-23 23:57:41,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:41,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984678406] [2024-11-23 23:57:41,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:41,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:41,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984678406] [2024-11-23 23:57:41,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984678406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115991943] [2024-11-23 23:57:41,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:41,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:41,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:41,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:57:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:41,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:57:41,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:41,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:41,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115991943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:41,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:41,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-23 23:57:41,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129756653] [2024-11-23 23:57:41,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:41,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:57:41,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:41,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:57:41,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:57:41,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:57:41,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 109 transitions, 769 flow. Second operand has 16 states, 16 states have (on average 48.125) internal successors, (770), 16 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:41,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:41,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:57:41,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:48,464 INFO L124 PetriNetUnfolderBase]: 39955/66256 cut-off events. [2024-11-23 23:57:48,464 INFO L125 PetriNetUnfolderBase]: For 92013/94839 co-relation queries the response was YES. [2024-11-23 23:57:48,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170134 conditions, 66256 events. 39955/66256 cut-off events. For 92013/94839 co-relation queries the response was YES. Maximal size of possible extension queue 2190. Compared 580573 event pairs, 12313 based on Foata normal form. 924/64620 useless extension candidates. Maximal degree in co-relation 141867. Up to 15990 conditions per place. [2024-11-23 23:57:48,853 INFO L140 encePairwiseOnDemand]: 74/87 looper letters, 338 selfloop transitions, 52 changer transitions 0/414 dead transitions. [2024-11-23 23:57:48,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 414 transitions, 3173 flow [2024-11-23 23:57:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:57:48,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-23 23:57:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1391 transitions. [2024-11-23 23:57:48,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6661877394636015 [2024-11-23 23:57:48,856 INFO L175 Difference]: Start difference. First operand has 133 places, 109 transitions, 769 flow. Second operand 24 states and 1391 transitions. [2024-11-23 23:57:48,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 414 transitions, 3173 flow [2024-11-23 23:57:49,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 414 transitions, 3042 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-11-23 23:57:49,010 INFO L231 Difference]: Finished difference. Result has 158 places, 141 transitions, 1120 flow [2024-11-23 23:57:49,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1120, PETRI_PLACES=158, PETRI_TRANSITIONS=141} [2024-11-23 23:57:49,011 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 74 predicate places. [2024-11-23 23:57:49,011 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 141 transitions, 1120 flow [2024-11-23 23:57:49,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.125) internal successors, (770), 16 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:49,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:49,011 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:49,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 23:57:49,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-23 23:57:49,212 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:49,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1241867328, now seen corresponding path program 1 times [2024-11-23 23:57:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:49,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956095870] [2024-11-23 23:57:49,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:49,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956095870] [2024-11-23 23:57:49,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956095870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:49,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805534198] [2024-11-23 23:57:49,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:49,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:49,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:49,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:49,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:57:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:49,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:57:49,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:49,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:49,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-23 23:57:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:49,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805534198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:49,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:49,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-23 23:57:49,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89950796] [2024-11-23 23:57:49,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:49,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:57:49,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:49,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:57:49,685 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:57:50,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:57:50,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 141 transitions, 1120 flow. Second operand has 11 states, 11 states have (on average 46.54545454545455) internal successors, (512), 11 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:50,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:50,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:57:50,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:58,078 INFO L124 PetriNetUnfolderBase]: 43255/69751 cut-off events. [2024-11-23 23:57:58,078 INFO L125 PetriNetUnfolderBase]: For 118364/122484 co-relation queries the response was YES. [2024-11-23 23:57:58,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183309 conditions, 69751 events. 43255/69751 cut-off events. For 118364/122484 co-relation queries the response was YES. Maximal size of possible extension queue 2373. Compared 592910 event pairs, 16252 based on Foata normal form. 0/67433 useless extension candidates. Maximal degree in co-relation 152940. Up to 20800 conditions per place. [2024-11-23 23:57:58,552 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 179 selfloop transitions, 36 changer transitions 0/237 dead transitions. [2024-11-23 23:57:58,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 237 transitions, 2181 flow [2024-11-23 23:57:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:57:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:57:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 423 transitions. [2024-11-23 23:57:58,554 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6945812807881774 [2024-11-23 23:57:58,554 INFO L175 Difference]: Start difference. First operand has 158 places, 141 transitions, 1120 flow. Second operand 7 states and 423 transitions. [2024-11-23 23:57:58,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 237 transitions, 2181 flow [2024-11-23 23:57:58,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 237 transitions, 2147 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:57:58,707 INFO L231 Difference]: Finished difference. Result has 161 places, 141 transitions, 1178 flow [2024-11-23 23:57:58,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1178, PETRI_PLACES=161, PETRI_TRANSITIONS=141} [2024-11-23 23:57:58,708 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 77 predicate places. [2024-11-23 23:57:58,708 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 141 transitions, 1178 flow [2024-11-23 23:57:58,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.54545454545455) internal successors, (512), 11 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:58,709 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:58,709 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:58,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:57:58,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-23 23:57:58,909 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:57:58,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1421149692, now seen corresponding path program 1 times [2024-11-23 23:57:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:58,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064859558] [2024-11-23 23:57:58,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:59,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064859558] [2024-11-23 23:57:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064859558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329969996] [2024-11-23 23:57:59,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:59,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:59,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:59,009 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:59,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:57:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:59,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:57:59,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:59,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:59,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329969996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:59,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:59,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-23 23:57:59,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155861626] [2024-11-23 23:57:59,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:59,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:57:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:59,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:57:59,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:57:59,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:57:59,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 141 transitions, 1178 flow. Second operand has 16 states, 16 states have (on average 48.375) internal successors, (774), 16 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:59,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:59,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:57:59,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:58:11,117 INFO L124 PetriNetUnfolderBase]: 61214/99949 cut-off events. [2024-11-23 23:58:11,118 INFO L125 PetriNetUnfolderBase]: For 209676/216989 co-relation queries the response was YES. [2024-11-23 23:58:11,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276132 conditions, 99949 events. 61214/99949 cut-off events. For 209676/216989 co-relation queries the response was YES. Maximal size of possible extension queue 3472. Compared 908101 event pairs, 19534 based on Foata normal form. 1499/98480 useless extension candidates. Maximal degree in co-relation 239567. Up to 26322 conditions per place. [2024-11-23 23:58:11,880 INFO L140 encePairwiseOnDemand]: 74/87 looper letters, 317 selfloop transitions, 68 changer transitions 0/409 dead transitions. [2024-11-23 23:58:11,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 409 transitions, 3553 flow [2024-11-23 23:58:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-23 23:58:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-23 23:58:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1330 transitions. [2024-11-23 23:58:11,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6646676661669165 [2024-11-23 23:58:11,883 INFO L175 Difference]: Start difference. First operand has 161 places, 141 transitions, 1178 flow. Second operand 23 states and 1330 transitions. [2024-11-23 23:58:11,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 409 transitions, 3553 flow [2024-11-23 23:58:12,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 409 transitions, 3424 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-23 23:58:12,258 INFO L231 Difference]: Finished difference. Result has 183 places, 156 transitions, 1434 flow [2024-11-23 23:58:12,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1434, PETRI_PLACES=183, PETRI_TRANSITIONS=156} [2024-11-23 23:58:12,259 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 99 predicate places. [2024-11-23 23:58:12,259 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 156 transitions, 1434 flow [2024-11-23 23:58:12,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.375) internal successors, (774), 16 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:58:12,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:58:12,260 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:58:12,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 23:58:12,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-23 23:58:12,460 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:58:12,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:58:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash -377834851, now seen corresponding path program 1 times [2024-11-23 23:58:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:58:12,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955014982] [2024-11-23 23:58:12,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:58:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:58:12,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:58:12,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955014982] [2024-11-23 23:58:12,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955014982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:58:12,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445971283] [2024-11-23 23:58:12,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:12,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:58:12,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:58:12,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:58:12,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d038a121-3acd-4663-82e4-dcd15abf7daf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:58:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:12,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:58:12,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:58:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:58:12,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:58:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:58:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445971283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:58:12,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:58:12,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-23 23:58:12,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920115953] [2024-11-23 23:58:12,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:58:12,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:58:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:58:12,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:58:12,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:58:13,274 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:58:13,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 156 transitions, 1434 flow. Second operand has 16 states, 16 states have (on average 48.5625) internal successors, (777), 16 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:58:13,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:13,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:58:13,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand