./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya --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 c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:37:35,223 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:37:35,290 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:37:35,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:37:35,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:37:35,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:37:35,319 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:37:35,320 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:37:35,321 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:37:35,321 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:37:35,322 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:37:35,322 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:37:35,323 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:37:35,323 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:37:35,324 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:37:35,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:37:35,325 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:37:35,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:37:35,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:37:35,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:37:35,327 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:37:35,332 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:37:35,332 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:37:35,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:37:35,333 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:37:35,333 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:37:35,333 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:37:35,334 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:37:35,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:37:35,334 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:37:35,335 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:37:35,335 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:37:35,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:37:35,336 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:37:35,336 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:37:35,336 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:37:35,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:37:35,337 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:37:35,337 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:37:35,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:37:35,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:37:35,337 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 [2023-11-29 02:37:35,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:37:35,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:37:35,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:37:35,585 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:37:35,586 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:37:35,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2023-11-29 02:37:38,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:37:38,581 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:37:38,582 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2023-11-29 02:37:38,600 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/data/93cd921ed/a10d8c3499d548819715181376070ec5/FLAG69fce53c1 [2023-11-29 02:37:38,612 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/data/93cd921ed/a10d8c3499d548819715181376070ec5 [2023-11-29 02:37:38,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:37:38,616 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:37:38,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:37:38,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:37:38,623 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:37:38,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:37:38" (1/1) ... [2023-11-29 02:37:38,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74476bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:38, skipping insertion in model container [2023-11-29 02:37:38,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:37:38" (1/1) ... [2023-11-29 02:37:38,679 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:37:39,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:37:39,273 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:37:39,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:37:39,394 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:37:39,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39 WrapperNode [2023-11-29 02:37:39,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:37:39,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:37:39,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:37:39,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:37:39,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,424 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,453 INFO L138 Inliner]: procedures = 371, calls = 32, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2023-11-29 02:37:39,453 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:37:39,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:37:39,468 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:37:39,473 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:37:39,484 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,489 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,512 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [1, 5, 1, 14]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0, 0]. The 14 writes are split as follows [1, 2, 1, 10]. [2023-11-29 02:37:39,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,534 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,540 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:37:39,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:37:39,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:37:39,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:37:39,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (1/1) ... [2023-11-29 02:37:39,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:37:39,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:39,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:37:39,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:37:39,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:37:39,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 02:37:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 02:37:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 02:37:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 02:37:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:37:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 02:37:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:37:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:37:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:37:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:37:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:37:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:37:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:37:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:37:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 02:37:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:37:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:37:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 02:37:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 02:37:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 02:37:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 02:37:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 02:37:39,615 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 02:37:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:37:39,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:37:39,617 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:37:39,780 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:37:39,782 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:37:40,122 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:37:40,285 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:37:40,285 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:37:40,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:37:40 BoogieIcfgContainer [2023-11-29 02:37:40,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:37:40,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:37:40,288 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:37:40,292 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:37:40,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:37:38" (1/3) ... [2023-11-29 02:37:40,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b34879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:37:40, skipping insertion in model container [2023-11-29 02:37:40,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:39" (2/3) ... [2023-11-29 02:37:40,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b34879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:37:40, skipping insertion in model container [2023-11-29 02:37:40,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:37:40" (3/3) ... [2023-11-29 02:37:40,294 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2023-11-29 02:37:40,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:37:40,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-29 02:37:40,313 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:37:40,370 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:37:40,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 76 transitions, 156 flow [2023-11-29 02:37:40,443 INFO L124 PetriNetUnfolderBase]: 2/75 cut-off events. [2023-11-29 02:37:40,443 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:37:40,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 75 events. 2/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 288 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-29 02:37:40,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 76 transitions, 156 flow [2023-11-29 02:37:40,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 75 transitions, 153 flow [2023-11-29 02:37:40,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:37:40,480 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5ad69f94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:37:40,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-29 02:37:40,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:37:40,483 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-29 02:37:40,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:37:40,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:40,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-29 02:37:40,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:40,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:40,489 INFO L85 PathProgramCache]: Analyzing trace with hash 12824950, now seen corresponding path program 1 times [2023-11-29 02:37:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:40,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842021379] [2023-11-29 02:37:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:40,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:40,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:40,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842021379] [2023-11-29 02:37:40,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842021379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:40,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:37:40,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681728283] [2023-11-29 02:37:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:40,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:37:40,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:37:40,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:37:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 02:37:40,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2023-11-29 02:37:40,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:40,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 02:37:40,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:40,893 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2023-11-29 02:37:40,894 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:37:40,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 271 events. 65/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1341 event pairs, 63 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 376. Up to 155 conditions per place. [2023-11-29 02:37:40,899 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-29 02:37:40,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 213 flow [2023-11-29 02:37:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:37:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:37:40,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2023-11-29 02:37:40,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7631578947368421 [2023-11-29 02:37:40,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 174 transitions. [2023-11-29 02:37:40,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 174 transitions. [2023-11-29 02:37:40,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:40,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 174 transitions. [2023-11-29 02:37:40,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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) [2023-11-29 02:37:40,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2023-11-29 02:37:40,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2023-11-29 02:37:40,924 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 153 flow. Second operand 3 states and 174 transitions. [2023-11-29 02:37:40,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 213 flow [2023-11-29 02:37:40,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:37:40,931 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 164 flow [2023-11-29 02:37:40,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2023-11-29 02:37:40,936 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2023-11-29 02:37:40,936 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 164 flow [2023-11-29 02:37:40,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2023-11-29 02:37:40,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:40,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:37:40,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:37:40,937 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:40,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash 397486342, now seen corresponding path program 1 times [2023-11-29 02:37:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:40,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822104249] [2023-11-29 02:37:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:40,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:41,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:41,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822104249] [2023-11-29 02:37:41,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822104249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:41,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698480863] [2023-11-29 02:37:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:41,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:41,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:41,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:37:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:41,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:37:41,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:41,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:41,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698480863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:41,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:41,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 02:37:41,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038464937] [2023-11-29 02:37:41,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:41,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:37:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:37:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:37:41,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 02:37:41,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 49.285714285714285) internal successors, (345), 7 states have internal predecessors, (345), 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) [2023-11-29 02:37:41,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:41,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 02:37:41,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:41,341 INFO L124 PetriNetUnfolderBase]: 65/274 cut-off events. [2023-11-29 02:37:41,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:37:41,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 274 events. 65/274 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1345 event pairs, 63 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 435. Up to 155 conditions per place. [2023-11-29 02:37:41,344 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-11-29 02:37:41,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 240 flow [2023-11-29 02:37:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:37:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:37:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 323 transitions. [2023-11-29 02:37:41,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2023-11-29 02:37:41,349 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 323 transitions. [2023-11-29 02:37:41,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 323 transitions. [2023-11-29 02:37:41,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:41,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 323 transitions. [2023-11-29 02:37:41,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 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) [2023-11-29 02:37:41,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 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) [2023-11-29 02:37:41,356 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 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) [2023-11-29 02:37:41,357 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 164 flow. Second operand 6 states and 323 transitions. [2023-11-29 02:37:41,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 240 flow [2023-11-29 02:37:41,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 236 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 02:37:41,359 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 196 flow [2023-11-29 02:37:41,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2023-11-29 02:37:41,360 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2023-11-29 02:37:41,360 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 196 flow [2023-11-29 02:37:41,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.285714285714285) internal successors, (345), 7 states have internal predecessors, (345), 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) [2023-11-29 02:37:41,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:41,361 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-29 02:37:41,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:37:41,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:41,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:41,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash 204281206, now seen corresponding path program 2 times [2023-11-29 02:37:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:41,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015408329] [2023-11-29 02:37:41,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:41,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:37:41,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015408329] [2023-11-29 02:37:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015408329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:41,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:41,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:37:41,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725818975] [2023-11-29 02:37:41,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:41,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:37:41,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:37:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:37:41,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2023-11-29 02:37:41,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-11-29 02:37:41,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:41,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2023-11-29 02:37:41,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:41,826 INFO L124 PetriNetUnfolderBase]: 65/270 cut-off events. [2023-11-29 02:37:41,826 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:37:41,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 270 events. 65/270 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1310 event pairs, 63 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 424. Up to 157 conditions per place. [2023-11-29 02:37:41,829 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 30 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-29 02:37:41,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 75 transitions, 256 flow [2023-11-29 02:37:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:37:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:37:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-29 02:37:41,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2023-11-29 02:37:41,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-29 02:37:41,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-29 02:37:41,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:41,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-29 02:37:41,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2023-11-29 02:37:41,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2023-11-29 02:37:41,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2023-11-29 02:37:41,835 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 196 flow. Second operand 3 states and 160 transitions. [2023-11-29 02:37:41,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 75 transitions, 256 flow [2023-11-29 02:37:41,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 242 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 02:37:41,838 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 182 flow [2023-11-29 02:37:41,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-11-29 02:37:41,840 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 6 predicate places. [2023-11-29 02:37:41,840 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 182 flow [2023-11-29 02:37:41,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-11-29 02:37:41,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:41,840 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-29 02:37:41,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:37:41,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:41,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash 204281207, now seen corresponding path program 1 times [2023-11-29 02:37:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:41,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860106765] [2023-11-29 02:37:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:41,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860106765] [2023-11-29 02:37:41,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860106765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585567230] [2023-11-29 02:37:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:41,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:41,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:41,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:41,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:37:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:42,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:37:42,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:42,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:42,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585567230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:42,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:42,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 02:37:42,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720268230] [2023-11-29 02:37:42,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:42,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:37:42,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:37:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:37:42,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 02:37:42,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 49.15384615384615) internal successors, (639), 13 states have internal predecessors, (639), 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) [2023-11-29 02:37:42,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:42,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 02:37:42,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:42,303 INFO L124 PetriNetUnfolderBase]: 65/276 cut-off events. [2023-11-29 02:37:42,304 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-29 02:37:42,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 276 events. 65/276 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1314 event pairs, 63 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 434. Up to 155 conditions per place. [2023-11-29 02:37:42,307 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-11-29 02:37:42,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 81 transitions, 294 flow [2023-11-29 02:37:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:37:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:37:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 620 transitions. [2023-11-29 02:37:42,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6798245614035088 [2023-11-29 02:37:42,310 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 620 transitions. [2023-11-29 02:37:42,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 620 transitions. [2023-11-29 02:37:42,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:42,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 620 transitions. [2023-11-29 02:37:42,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 51.666666666666664) internal successors, (620), 12 states have internal predecessors, (620), 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) [2023-11-29 02:37:42,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 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) [2023-11-29 02:37:42,318 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 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) [2023-11-29 02:37:42,318 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 182 flow. Second operand 12 states and 620 transitions. [2023-11-29 02:37:42,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 81 transitions, 294 flow [2023-11-29 02:37:42,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 81 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:37:42,322 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 258 flow [2023-11-29 02:37:42,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=258, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-11-29 02:37:42,323 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-29 02:37:42,323 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 258 flow [2023-11-29 02:37:42,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.15384615384615) internal successors, (639), 13 states have internal predecessors, (639), 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) [2023-11-29 02:37:42,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:42,324 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-29 02:37:42,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:37:42,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:42,530 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:42,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1126077577, now seen corresponding path program 2 times [2023-11-29 02:37:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:42,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699878684] [2023-11-29 02:37:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:42,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:42,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:42,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699878684] [2023-11-29 02:37:42,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699878684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:42,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:42,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:37:42,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246138556] [2023-11-29 02:37:42,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:42,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:37:42,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:37:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:37:42,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 76 [2023-11-29 02:37:42,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-11-29 02:37:42,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:42,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 76 [2023-11-29 02:37:42,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:42,813 INFO L124 PetriNetUnfolderBase]: 65/272 cut-off events. [2023-11-29 02:37:42,813 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-29 02:37:42,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 272 events. 65/272 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1294 event pairs, 63 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 424. Up to 163 conditions per place. [2023-11-29 02:37:42,816 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 34 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-29 02:37:42,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 77 transitions, 326 flow [2023-11-29 02:37:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:37:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:37:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-29 02:37:42,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7192982456140351 [2023-11-29 02:37:42,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-29 02:37:42,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-29 02:37:42,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:42,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-29 02:37:42,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-11-29 02:37:42,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2023-11-29 02:37:42,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2023-11-29 02:37:42,820 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 258 flow. Second operand 3 states and 164 transitions. [2023-11-29 02:37:42,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 77 transitions, 326 flow [2023-11-29 02:37:42,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 77 transitions, 278 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-29 02:37:42,826 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 210 flow [2023-11-29 02:37:42,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2023-11-29 02:37:42,827 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2023-11-29 02:37:42,827 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 210 flow [2023-11-29 02:37:42,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-11-29 02:37:42,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:42,828 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-29 02:37:42,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:37:42,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:42,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1126077575, now seen corresponding path program 1 times [2023-11-29 02:37:42,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:42,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859175407] [2023-11-29 02:37:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:42,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:42,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859175407] [2023-11-29 02:37:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859175407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:42,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:37:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050624879] [2023-11-29 02:37:42,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:42,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:37:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:37:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:37:42,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 02:37:42,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2023-11-29 02:37:42,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:42,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 02:37:42,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:42,992 INFO L124 PetriNetUnfolderBase]: 65/292 cut-off events. [2023-11-29 02:37:42,992 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-29 02:37:42,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 292 events. 65/292 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1324 event pairs, 63 based on Foata normal form. 1/229 useless extension candidates. Maximal degree in co-relation 459. Up to 165 conditions per place. [2023-11-29 02:37:42,995 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 43 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-29 02:37:42,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 322 flow [2023-11-29 02:37:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:37:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:37:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2023-11-29 02:37:42,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2023-11-29 02:37:42,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2023-11-29 02:37:42,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2023-11-29 02:37:42,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:42,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2023-11-29 02:37:42,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2023-11-29 02:37:42,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2023-11-29 02:37:42,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2023-11-29 02:37:42,999 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 210 flow. Second operand 3 states and 180 transitions. [2023-11-29 02:37:43,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 322 flow [2023-11-29 02:37:43,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 84 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:37:43,004 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 214 flow [2023-11-29 02:37:43,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2023-11-29 02:37:43,005 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2023-11-29 02:37:43,005 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 214 flow [2023-11-29 02:37:43,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2023-11-29 02:37:43,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:43,006 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:43,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:37:43,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:43,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 171217837, now seen corresponding path program 1 times [2023-11-29 02:37:43,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:43,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449878163] [2023-11-29 02:37:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:43,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:43,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449878163] [2023-11-29 02:37:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449878163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:43,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:43,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:37:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574457900] [2023-11-29 02:37:43,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:37:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:37:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:37:43,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-29 02:37:43,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2023-11-29 02:37:43,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:43,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-29 02:37:43,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:43,504 INFO L124 PetriNetUnfolderBase]: 78/344 cut-off events. [2023-11-29 02:37:43,504 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-29 02:37:43,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 344 events. 78/344 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1652 event pairs, 55 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 547. Up to 156 conditions per place. [2023-11-29 02:37:43,507 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 54 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-11-29 02:37:43,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 350 flow [2023-11-29 02:37:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:37:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:37:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2023-11-29 02:37:43,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7039473684210527 [2023-11-29 02:37:43,509 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 214 transitions. [2023-11-29 02:37:43,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 214 transitions. [2023-11-29 02:37:43,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:43,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 214 transitions. [2023-11-29 02:37:43,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 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) [2023-11-29 02:37:43,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 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) [2023-11-29 02:37:43,512 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 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) [2023-11-29 02:37:43,512 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 214 flow. Second operand 4 states and 214 transitions. [2023-11-29 02:37:43,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 350 flow [2023-11-29 02:37:43,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:37:43,515 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 223 flow [2023-11-29 02:37:43,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2023-11-29 02:37:43,516 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-11-29 02:37:43,517 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 223 flow [2023-11-29 02:37:43,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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) [2023-11-29 02:37:43,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:43,517 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:43,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:37:43,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:43,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash 171217838, now seen corresponding path program 1 times [2023-11-29 02:37:43,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:43,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969140438] [2023-11-29 02:37:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:43,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:43,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:43,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969140438] [2023-11-29 02:37:43,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969140438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:43,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:43,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:37:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929355330] [2023-11-29 02:37:43,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:37:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:37:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:37:44,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-29 02:37:44,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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) [2023-11-29 02:37:44,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:44,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-29 02:37:44,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:44,282 INFO L124 PetriNetUnfolderBase]: 78/342 cut-off events. [2023-11-29 02:37:44,282 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-29 02:37:44,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 342 events. 78/342 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1652 event pairs, 60 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 575. Up to 147 conditions per place. [2023-11-29 02:37:44,285 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 50 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2023-11-29 02:37:44,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 90 transitions, 367 flow [2023-11-29 02:37:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:37:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:37:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2023-11-29 02:37:44,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2023-11-29 02:37:44,287 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 255 transitions. [2023-11-29 02:37:44,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 255 transitions. [2023-11-29 02:37:44,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:44,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 255 transitions. [2023-11-29 02:37:44,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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) [2023-11-29 02:37:44,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 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) [2023-11-29 02:37:44,289 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 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) [2023-11-29 02:37:44,290 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 223 flow. Second operand 5 states and 255 transitions. [2023-11-29 02:37:44,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 90 transitions, 367 flow [2023-11-29 02:37:44,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 90 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:37:44,293 INFO L231 Difference]: Finished difference. Result has 98 places, 80 transitions, 267 flow [2023-11-29 02:37:44,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=98, PETRI_TRANSITIONS=80} [2023-11-29 02:37:44,294 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-29 02:37:44,294 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 80 transitions, 267 flow [2023-11-29 02:37:44,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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) [2023-11-29 02:37:44,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:44,295 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:44,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:37:44,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:44,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash -234317450, now seen corresponding path program 1 times [2023-11-29 02:37:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:44,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718002546] [2023-11-29 02:37:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:44,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:44,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:44,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718002546] [2023-11-29 02:37:44,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718002546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:44,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:44,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:37:44,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402746888] [2023-11-29 02:37:44,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:44,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:37:44,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:44,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:37:44,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:37:44,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 76 [2023-11-29 02:37:44,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 80 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 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) [2023-11-29 02:37:44,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:44,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 76 [2023-11-29 02:37:44,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:45,013 INFO L124 PetriNetUnfolderBase]: 68/304 cut-off events. [2023-11-29 02:37:45,013 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-29 02:37:45,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 304 events. 68/304 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1407 event pairs, 66 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 544. Up to 173 conditions per place. [2023-11-29 02:37:45,016 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 36 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2023-11-29 02:37:45,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 78 transitions, 357 flow [2023-11-29 02:37:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:37:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:37:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 306 transitions. [2023-11-29 02:37:45,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575187969924812 [2023-11-29 02:37:45,018 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 306 transitions. [2023-11-29 02:37:45,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 306 transitions. [2023-11-29 02:37:45,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:45,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 306 transitions. [2023-11-29 02:37:45,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 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) [2023-11-29 02:37:45,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 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) [2023-11-29 02:37:45,021 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 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) [2023-11-29 02:37:45,022 INFO L175 Difference]: Start difference. First operand has 98 places, 80 transitions, 267 flow. Second operand 7 states and 306 transitions. [2023-11-29 02:37:45,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 78 transitions, 357 flow [2023-11-29 02:37:45,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 78 transitions, 349 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:37:45,026 INFO L231 Difference]: Finished difference. Result has 99 places, 78 transitions, 277 flow [2023-11-29 02:37:45,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=277, PETRI_PLACES=99, PETRI_TRANSITIONS=78} [2023-11-29 02:37:45,027 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 22 predicate places. [2023-11-29 02:37:45,027 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 78 transitions, 277 flow [2023-11-29 02:37:45,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 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) [2023-11-29 02:37:45,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:45,027 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:45,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:37:45,027 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:45,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash -234317449, now seen corresponding path program 1 times [2023-11-29 02:37:45,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:45,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676162378] [2023-11-29 02:37:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:45,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:45,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:45,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676162378] [2023-11-29 02:37:45,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676162378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:45,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:45,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:37:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195074655] [2023-11-29 02:37:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:45,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:37:45,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:37:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:37:45,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2023-11-29 02:37:45,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 78 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 43.5) internal successors, (261), 6 states have internal predecessors, (261), 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) [2023-11-29 02:37:45,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:45,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2023-11-29 02:37:45,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:45,834 INFO L124 PetriNetUnfolderBase]: 68/300 cut-off events. [2023-11-29 02:37:45,834 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-29 02:37:45,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 300 events. 68/300 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1387 event pairs, 66 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 534. Up to 173 conditions per place. [2023-11-29 02:37:45,836 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 33 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2023-11-29 02:37:45,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 76 transitions, 361 flow [2023-11-29 02:37:45,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:37:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:37:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2023-11-29 02:37:45,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090225563909775 [2023-11-29 02:37:45,838 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 324 transitions. [2023-11-29 02:37:45,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 324 transitions. [2023-11-29 02:37:45,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:45,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 324 transitions. [2023-11-29 02:37:45,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 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) [2023-11-29 02:37:45,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 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) [2023-11-29 02:37:45,841 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 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) [2023-11-29 02:37:45,841 INFO L175 Difference]: Start difference. First operand has 99 places, 78 transitions, 277 flow. Second operand 7 states and 324 transitions. [2023-11-29 02:37:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 76 transitions, 361 flow [2023-11-29 02:37:45,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 76 transitions, 339 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 02:37:45,844 INFO L231 Difference]: Finished difference. Result has 97 places, 76 transitions, 273 flow [2023-11-29 02:37:45,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=97, PETRI_TRANSITIONS=76} [2023-11-29 02:37:45,845 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 20 predicate places. [2023-11-29 02:37:45,845 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 76 transitions, 273 flow [2023-11-29 02:37:45,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.5) internal successors, (261), 6 states have internal predecessors, (261), 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) [2023-11-29 02:37:45,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:45,846 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:45,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:37:45,846 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:45,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:45,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1840754856, now seen corresponding path program 1 times [2023-11-29 02:37:45,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:45,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31955738] [2023-11-29 02:37:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:45,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:45,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:45,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31955738] [2023-11-29 02:37:45,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31955738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:45,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:45,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:37:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779097508] [2023-11-29 02:37:45,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:45,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:37:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:37:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:37:46,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-29 02:37:46,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 76 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 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) [2023-11-29 02:37:46,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:46,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-29 02:37:46,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:46,235 INFO L124 PetriNetUnfolderBase]: 68/298 cut-off events. [2023-11-29 02:37:46,235 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-29 02:37:46,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 298 events. 68/298 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1374 event pairs, 66 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 536. Up to 175 conditions per place. [2023-11-29 02:37:46,237 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 35 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-11-29 02:37:46,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 75 transitions, 363 flow [2023-11-29 02:37:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:37:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:37:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2023-11-29 02:37:46,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6210526315789474 [2023-11-29 02:37:46,239 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 236 transitions. [2023-11-29 02:37:46,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 236 transitions. [2023-11-29 02:37:46,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:46,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 236 transitions. [2023-11-29 02:37:46,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.2) internal successors, (236), 5 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:46,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 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) [2023-11-29 02:37:46,241 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 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) [2023-11-29 02:37:46,241 INFO L175 Difference]: Start difference. First operand has 97 places, 76 transitions, 273 flow. Second operand 5 states and 236 transitions. [2023-11-29 02:37:46,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 75 transitions, 363 flow [2023-11-29 02:37:46,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 75 transitions, 341 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 02:37:46,245 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 271 flow [2023-11-29 02:37:46,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-11-29 02:37:46,246 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 17 predicate places. [2023-11-29 02:37:46,246 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 271 flow [2023-11-29 02:37:46,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 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) [2023-11-29 02:37:46,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:46,246 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:46,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 02:37:46,247 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:46,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1840754855, now seen corresponding path program 1 times [2023-11-29 02:37:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998842413] [2023-11-29 02:37:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998842413] [2023-11-29 02:37:46,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998842413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:46,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:46,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:37:46,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665000283] [2023-11-29 02:37:46,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:46,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:37:46,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:46,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:37:46,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:37:46,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 76 [2023-11-29 02:37:46,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 271 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) [2023-11-29 02:37:46,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:46,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 76 [2023-11-29 02:37:46,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:46,727 INFO L124 PetriNetUnfolderBase]: 68/296 cut-off events. [2023-11-29 02:37:46,727 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-29 02:37:46,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 296 events. 68/296 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1355 event pairs, 66 based on Foata normal form. 2/244 useless extension candidates. Maximal degree in co-relation 530. Up to 175 conditions per place. [2023-11-29 02:37:46,729 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 33 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-11-29 02:37:46,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 74 transitions, 357 flow [2023-11-29 02:37:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:37:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:37:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2023-11-29 02:37:46,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2023-11-29 02:37:46,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 244 transitions. [2023-11-29 02:37:46,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 244 transitions. [2023-11-29 02:37:46,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:46,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 244 transitions. [2023-11-29 02:37:46,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 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) [2023-11-29 02:37:46,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 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) [2023-11-29 02:37:46,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 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) [2023-11-29 02:37:46,733 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 271 flow. Second operand 5 states and 244 transitions. [2023-11-29 02:37:46,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 74 transitions, 357 flow [2023-11-29 02:37:46,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 74 transitions, 335 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:37:46,737 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 269 flow [2023-11-29 02:37:46,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2023-11-29 02:37:46,737 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-11-29 02:37:46,738 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 269 flow [2023-11-29 02:37:46,738 INFO L496 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) [2023-11-29 02:37:46,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:46,738 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:46,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:37:46,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:46,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:46,739 INFO L85 PathProgramCache]: Analyzing trace with hash 561125120, now seen corresponding path program 1 times [2023-11-29 02:37:46,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:46,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908369581] [2023-11-29 02:37:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:46,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908369581] [2023-11-29 02:37:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908369581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300769115] [2023-11-29 02:37:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:46,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:46,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:46,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:46,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:37:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:46,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:37:46,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:47,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:47,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300769115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:47,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:47,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 02:37:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841222259] [2023-11-29 02:37:47,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:47,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:37:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:37:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:37:47,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 02:37:47,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 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) [2023-11-29 02:37:47,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:47,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 02:37:47,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:47,206 INFO L124 PetriNetUnfolderBase]: 68/321 cut-off events. [2023-11-29 02:37:47,206 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-29 02:37:47,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 321 events. 68/321 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1311 event pairs, 66 based on Foata normal form. 3/270 useless extension candidates. Maximal degree in co-relation 598. Up to 171 conditions per place. [2023-11-29 02:37:47,208 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 55 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-11-29 02:37:47,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 475 flow [2023-11-29 02:37:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:37:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:37:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 341 transitions. [2023-11-29 02:37:47,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7478070175438597 [2023-11-29 02:37:47,210 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 341 transitions. [2023-11-29 02:37:47,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 341 transitions. [2023-11-29 02:37:47,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:47,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 341 transitions. [2023-11-29 02:37:47,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 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) [2023-11-29 02:37:47,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 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) [2023-11-29 02:37:47,213 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 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) [2023-11-29 02:37:47,213 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 269 flow. Second operand 6 states and 341 transitions. [2023-11-29 02:37:47,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 475 flow [2023-11-29 02:37:47,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 425 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:37:47,217 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 289 flow [2023-11-29 02:37:47,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2023-11-29 02:37:47,218 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-29 02:37:47,218 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 289 flow [2023-11-29 02:37:47,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 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) [2023-11-29 02:37:47,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:47,218 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:47,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:37:47,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:37:47,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:47,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:47,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1924630155, now seen corresponding path program 1 times [2023-11-29 02:37:47,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:47,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907924563] [2023-11-29 02:37:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:47,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:48,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:48,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907924563] [2023-11-29 02:37:48,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907924563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:48,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461477278] [2023-11-29 02:37:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:48,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:48,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:48,663 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:48,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:37:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:48,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 02:37:48,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:49,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:49,015 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 [2023-11-29 02:37:49,041 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 02:37:49,041 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 [2023-11-29 02:37:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:49,096 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 [2023-11-29 02:37:49,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:49,156 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 [2023-11-29 02:37:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:49,258 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 [2023-11-29 02:37:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:49,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:49,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:37:49,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-29 02:37:49,785 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:37:49,786 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 13 treesize of output 12 [2023-11-29 02:37:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:50,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461477278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:50,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:50,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 6] total 22 [2023-11-29 02:37:50,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113306112] [2023-11-29 02:37:50,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:50,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:37:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:37:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:37:53,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 76 [2023-11-29 02:37:53,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 289 flow. Second operand has 24 states, 24 states have (on average 32.125) internal successors, (771), 24 states have internal predecessors, (771), 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) [2023-11-29 02:37:53,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:53,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 76 [2023-11-29 02:37:53,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:54,622 INFO L124 PetriNetUnfolderBase]: 78/359 cut-off events. [2023-11-29 02:37:54,622 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-29 02:37:54,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 359 events. 78/359 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1572 event pairs, 60 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 675. Up to 143 conditions per place. [2023-11-29 02:37:54,624 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 80 selfloop transitions, 13 changer transitions 0/116 dead transitions. [2023-11-29 02:37:54,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 116 transitions, 583 flow [2023-11-29 02:37:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:37:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:37:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 390 transitions. [2023-11-29 02:37:54,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2023-11-29 02:37:54,626 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 390 transitions. [2023-11-29 02:37:54,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 390 transitions. [2023-11-29 02:37:54,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:54,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 390 transitions. [2023-11-29 02:37:54,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 39.0) internal successors, (390), 10 states have internal predecessors, (390), 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) [2023-11-29 02:37:54,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 76.0) internal successors, (836), 11 states have internal predecessors, (836), 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) [2023-11-29 02:37:54,629 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 76.0) internal successors, (836), 11 states have internal predecessors, (836), 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) [2023-11-29 02:37:54,629 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 289 flow. Second operand 10 states and 390 transitions. [2023-11-29 02:37:54,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 116 transitions, 583 flow [2023-11-29 02:37:54,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 116 transitions, 571 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-29 02:37:54,632 INFO L231 Difference]: Finished difference. Result has 109 places, 78 transitions, 331 flow [2023-11-29 02:37:54,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=331, PETRI_PLACES=109, PETRI_TRANSITIONS=78} [2023-11-29 02:37:54,633 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 32 predicate places. [2023-11-29 02:37:54,633 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 78 transitions, 331 flow [2023-11-29 02:37:54,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 32.125) internal successors, (771), 24 states have internal predecessors, (771), 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) [2023-11-29 02:37:54,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:54,634 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 02:37:54,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:37:54,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:54,836 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:54,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 877587733, now seen corresponding path program 2 times [2023-11-29 02:37:54,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:54,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10892641] [2023-11-29 02:37:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:54,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:55,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:55,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10892641] [2023-11-29 02:37:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10892641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:55,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807322576] [2023-11-29 02:37:55,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:37:55,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:55,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:55,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:55,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:37:55,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:37:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:37:55,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:37:55,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:55,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:55,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807322576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:55,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:55,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 02:37:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051633054] [2023-11-29 02:37:55,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:37:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:37:55,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:37:55,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 02:37:55,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 78 transitions, 331 flow. Second operand has 13 states, 13 states have (on average 53.38461538461539) internal successors, (694), 13 states have internal predecessors, (694), 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) [2023-11-29 02:37:55,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:37:55,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 02:37:55,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:37:55,888 INFO L124 PetriNetUnfolderBase]: 68/381 cut-off events. [2023-11-29 02:37:55,889 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2023-11-29 02:37:55,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 381 events. 68/381 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1308 event pairs, 66 based on Foata normal form. 6/333 useless extension candidates. Maximal degree in co-relation 801. Up to 171 conditions per place. [2023-11-29 02:37:55,891 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 91 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2023-11-29 02:37:55,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 132 transitions, 777 flow [2023-11-29 02:37:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:37:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:37:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 674 transitions. [2023-11-29 02:37:55,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7390350877192983 [2023-11-29 02:37:55,893 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 674 transitions. [2023-11-29 02:37:55,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 674 transitions. [2023-11-29 02:37:55,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:37:55,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 674 transitions. [2023-11-29 02:37:55,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 56.166666666666664) internal successors, (674), 12 states have internal predecessors, (674), 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) [2023-11-29 02:37:55,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 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) [2023-11-29 02:37:55,898 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 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) [2023-11-29 02:37:55,899 INFO L175 Difference]: Start difference. First operand has 109 places, 78 transitions, 331 flow. Second operand 12 states and 674 transitions. [2023-11-29 02:37:55,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 132 transitions, 777 flow [2023-11-29 02:37:55,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 132 transitions, 746 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 02:37:55,903 INFO L231 Difference]: Finished difference. Result has 121 places, 84 transitions, 410 flow [2023-11-29 02:37:55,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=410, PETRI_PLACES=121, PETRI_TRANSITIONS=84} [2023-11-29 02:37:55,904 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 44 predicate places. [2023-11-29 02:37:55,904 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 84 transitions, 410 flow [2023-11-29 02:37:55,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 53.38461538461539) internal successors, (694), 13 states have internal predecessors, (694), 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) [2023-11-29 02:37:55,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:37:55,905 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2023-11-29 02:37:55,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:37:56,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:56,106 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:37:56,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:56,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1548230218, now seen corresponding path program 2 times [2023-11-29 02:37:56,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:56,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926235930] [2023-11-29 02:37:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:56,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:58,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926235930] [2023-11-29 02:37:58,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926235930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514080344] [2023-11-29 02:37:58,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:37:58,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:58,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:58,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:37:58,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:37:58,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:37:58,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-29 02:37:58,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:58,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:58,640 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 [2023-11-29 02:37:58,657 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 02:37:58,657 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 [2023-11-29 02:37:58,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:58,697 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 [2023-11-29 02:37:58,750 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 02:37:58,751 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 [2023-11-29 02:37:58,756 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 [2023-11-29 02:37:58,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:58,869 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 [2023-11-29 02:37:58,913 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 02:37:58,913 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 [2023-11-29 02:37:58,920 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 [2023-11-29 02:37:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:59,039 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 [2023-11-29 02:37:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:59,081 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 [2023-11-29 02:37:59,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:59,173 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 [2023-11-29 02:37:59,225 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 02:37:59,225 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 [2023-11-29 02:37:59,230 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 [2023-11-29 02:37:59,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:37:59,382 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 [2023-11-29 02:37:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:37:59,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:59,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:37:59,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-29 02:37:59,781 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:37:59,782 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 13 treesize of output 12 [2023-11-29 02:38:04,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:38:04,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-29 02:38:04,323 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:38:04,323 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 13 treesize of output 12 [2023-11-29 02:38:04,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:38:04,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-29 02:38:04,841 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:38:04,841 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 13 treesize of output 12 [2023-11-29 02:38:05,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:38:05,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-29 02:38:05,506 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:38:05,506 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 13 treesize of output 12 [2023-11-29 02:38:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:38:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514080344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:38:06,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:38:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 12] total 45 [2023-11-29 02:38:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081146556] [2023-11-29 02:38:06,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:38:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 02:38:06,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:38:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 02:38:06,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 02:38:18,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 76 [2023-11-29 02:38:18,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 84 transitions, 410 flow. Second operand has 47 states, 47 states have (on average 39.170212765957444) internal successors, (1841), 47 states have internal predecessors, (1841), 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) [2023-11-29 02:38:18,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:38:18,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 76 [2023-11-29 02:38:18,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:38:19,997 INFO L124 PetriNetUnfolderBase]: 78/413 cut-off events. [2023-11-29 02:38:19,997 INFO L125 PetriNetUnfolderBase]: For 371/371 co-relation queries the response was YES. [2023-11-29 02:38:19,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 413 events. 78/413 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1533 event pairs, 60 based on Foata normal form. 6/362 useless extension candidates. Maximal degree in co-relation 851. Up to 141 conditions per place. [2023-11-29 02:38:20,000 INFO L140 encePairwiseOnDemand]: 67/76 looper letters, 86 selfloop transitions, 30 changer transitions 0/142 dead transitions. [2023-11-29 02:38:20,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 142 transitions, 863 flow [2023-11-29 02:38:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:38:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:38:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 852 transitions. [2023-11-29 02:38:20,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5605263157894737 [2023-11-29 02:38:20,004 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 852 transitions. [2023-11-29 02:38:20,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 852 transitions. [2023-11-29 02:38:20,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:38:20,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 852 transitions. [2023-11-29 02:38:20,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 42.6) internal successors, (852), 20 states have internal predecessors, (852), 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) [2023-11-29 02:38:20,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 76.0) internal successors, (1596), 21 states have internal predecessors, (1596), 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) [2023-11-29 02:38:20,010 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 76.0) internal successors, (1596), 21 states have internal predecessors, (1596), 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) [2023-11-29 02:38:20,011 INFO L175 Difference]: Start difference. First operand has 121 places, 84 transitions, 410 flow. Second operand 20 states and 852 transitions. [2023-11-29 02:38:20,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 142 transitions, 863 flow [2023-11-29 02:38:20,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 142 transitions, 855 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:38:20,018 INFO L231 Difference]: Finished difference. Result has 146 places, 97 transitions, 599 flow [2023-11-29 02:38:20,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=599, PETRI_PLACES=146, PETRI_TRANSITIONS=97} [2023-11-29 02:38:20,018 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2023-11-29 02:38:20,018 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 97 transitions, 599 flow [2023-11-29 02:38:20,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 39.170212765957444) internal successors, (1841), 47 states have internal predecessors, (1841), 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) [2023-11-29 02:38:20,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:38:20,019 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-29 02:38:20,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:38:20,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:38:20,220 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 02:38:20,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:38:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash -849891073, now seen corresponding path program 3 times [2023-11-29 02:38:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:38:20,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371161014] [2023-11-29 02:38:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:38:20,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:38:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:38:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-11-29 02:38:23,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:38:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371161014] [2023-11-29 02:38:23,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371161014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:38:23,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829034762] [2023-11-29 02:38:23,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:38:23,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:38:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:38:23,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:38:23,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba14bf0-840a-4568-95a3-17883a00c9ff/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process