./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.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_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/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_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/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_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/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 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:48:59,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:48:59,067 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:48:59,071 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:48:59,072 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:48:59,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:48:59,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:48:59,095 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:48:59,096 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:48:59,097 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:48:59,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:48:59,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:48:59,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:48:59,099 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:48:59,099 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:48:59,100 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:48:59,101 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:48:59,101 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:48:59,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:48:59,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:48:59,102 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:48:59,104 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:48:59,104 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:48:59,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:48:59,104 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:48:59,105 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:48:59,105 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:48:59,106 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:48:59,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:48:59,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:48:59,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:48:59,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:48:59,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:48:59,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:48:59,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:48:59,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:48:59,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:48:59,109 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:48:59,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:48:59,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:48:59,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:48:59,109 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_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2023-11-29 02:48:59,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:48:59,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:48:59,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:48:59,330 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:48:59,331 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:48:59,332 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2023-11-29 02:49:02,044 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:49:02,312 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:49:02,313 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2023-11-29 02:49:02,334 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/data/5a243c4cd/a494ad237a1a4032bfb94011fc1c055c/FLAGe5d2f52e5 [2023-11-29 02:49:02,349 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/data/5a243c4cd/a494ad237a1a4032bfb94011fc1c055c [2023-11-29 02:49:02,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:49:02,354 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:49:02,355 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:49:02,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:49:02,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:49:02,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:49:02" (1/1) ... [2023-11-29 02:49:02,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a8166b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:02, skipping insertion in model container [2023-11-29 02:49:02,363 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:49:02" (1/1) ... [2023-11-29 02:49:02,417 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:49:03,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:49:03,054 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:49:03,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:49:03,212 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:49:03,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03 WrapperNode [2023-11-29 02:49:03,212 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:49:03,214 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:49:03,214 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:49:03,214 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:49:03,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,302 INFO L138 Inliner]: procedures = 371, calls = 38, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 163 [2023-11-29 02:49:03,303 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:49:03,304 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:49:03,304 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:49:03,304 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:49:03,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,320 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,345 INFO L175 MemorySlicer]: Split 31 memory accesses to 4 slices as follows [1, 7, 22, 1]. 71 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0, 0]. The 20 writes are split as follows [1, 2, 16, 1]. [2023-11-29 02:49:03,346 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,361 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,375 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:49:03,376 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:49:03,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:49:03,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:49:03,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (1/1) ... [2023-11-29 02:49:03,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:49:03,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:03,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:49:03,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:49:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:49:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 02:49:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 02:49:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 02:49:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 02:49:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:49:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 02:49:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:49:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:49:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:49:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:49:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:49:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:49:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:49:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:49:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 02:49:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:49:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:49:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 02:49:03,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 02:49:03,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 02:49:03,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 02:49:03,442 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 02:49:03,442 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 02:49:03,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:49:03,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:49:03,444 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 02:49:03,610 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:49:03,613 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:49:04,029 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:49:04,215 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:49:04,215 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:49:04,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:49:04 BoogieIcfgContainer [2023-11-29 02:49:04,216 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:49:04,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:49:04,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:49:04,221 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:49:04,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:49:02" (1/3) ... [2023-11-29 02:49:04,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd4d951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:49:04, skipping insertion in model container [2023-11-29 02:49:04,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:49:03" (2/3) ... [2023-11-29 02:49:04,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd4d951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:49:04, skipping insertion in model container [2023-11-29 02:49:04,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:49:04" (3/3) ... [2023-11-29 02:49:04,224 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2023-11-29 02:49:04,240 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:49:04,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2023-11-29 02:49:04,240 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:49:04,319 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:49:04,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 104 transitions, 212 flow [2023-11-29 02:49:04,403 INFO L124 PetriNetUnfolderBase]: 1/103 cut-off events. [2023-11-29 02:49:04,403 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:49:04,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 103 events. 1/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2023-11-29 02:49:04,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 104 transitions, 212 flow [2023-11-29 02:49:04,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 103 transitions, 209 flow [2023-11-29 02:49:04,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:49:04,428 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;@24f0df00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:49:04,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-11-29 02:49:04,432 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:49:04,432 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 02:49:04,433 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:49:04,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:04,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:49:04,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:04,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash 512839, now seen corresponding path program 1 times [2023-11-29 02:49:04,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:04,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090339715] [2023-11-29 02:49:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:04,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:04,674 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 02:49:04,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:04,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090339715] [2023-11-29 02:49:04,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090339715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:04,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:04,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:49:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583848076] [2023-11-29 02:49:04,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:04,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:49:04,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:49:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:49:04,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 104 [2023-11-29 02:49:04,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 02:49:04,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:04,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 104 [2023-11-29 02:49:04,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:04,971 INFO L124 PetriNetUnfolderBase]: 64/292 cut-off events. [2023-11-29 02:49:04,971 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:49:04,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 292 events. 64/292 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1333 event pairs, 63 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2023-11-29 02:49:04,977 INFO L140 encePairwiseOnDemand]: 92/104 looper letters, 30 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2023-11-29 02:49:04,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 269 flow [2023-11-29 02:49:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:49:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:49:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-11-29 02:49:04,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2023-11-29 02:49:04,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-11-29 02:49:04,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-11-29 02:49:04,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:04,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-11-29 02:49:05,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 02:49:05,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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 02:49:05,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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 02:49:05,008 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 209 flow. Second operand 3 states and 228 transitions. [2023-11-29 02:49:05,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 269 flow [2023-11-29 02:49:05,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:49:05,016 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 208 flow [2023-11-29 02:49:05,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2023-11-29 02:49:05,022 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -5 predicate places. [2023-11-29 02:49:05,022 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 208 flow [2023-11-29 02:49:05,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 02:49:05,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:05,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:49:05,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:49:05,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:05,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:05,024 INFO L85 PathProgramCache]: Analyzing trace with hash 512840, now seen corresponding path program 1 times [2023-11-29 02:49:05,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:05,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134153428] [2023-11-29 02:49:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:05,136 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 02:49:05,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:05,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134153428] [2023-11-29 02:49:05,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134153428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:05,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:05,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:49:05,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663376896] [2023-11-29 02:49:05,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:05,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:49:05,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:49:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:49:05,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2023-11-29 02:49:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 02:49:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:05,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2023-11-29 02:49:05,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:05,396 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2023-11-29 02:49:05,397 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 02:49:05,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 286 events. 64/286 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1300 event pairs, 63 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 413. Up to 157 conditions per place. [2023-11-29 02:49:05,400 INFO L140 encePairwiseOnDemand]: 92/104 looper letters, 27 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-11-29 02:49:05,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 262 flow [2023-11-29 02:49:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:49:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:49:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-11-29 02:49:05,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-29 02:49:05,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-11-29 02:49:05,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-11-29 02:49:05,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:05,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-11-29 02:49:05,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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 02:49:05,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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 02:49:05,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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 02:49:05,409 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 208 flow. Second operand 3 states and 234 transitions. [2023-11-29 02:49:05,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 262 flow [2023-11-29 02:49:05,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:49:05,413 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 196 flow [2023-11-29 02:49:05,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2023-11-29 02:49:05,415 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -11 predicate places. [2023-11-29 02:49:05,415 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 196 flow [2023-11-29 02:49:05,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 02:49:05,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:05,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:49:05,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:49:05,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:05,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:05,417 INFO L85 PathProgramCache]: Analyzing trace with hash 492854477, now seen corresponding path program 1 times [2023-11-29 02:49:05,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:05,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044049455] [2023-11-29 02:49:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:05,610 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 02:49:05,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044049455] [2023-11-29 02:49:05,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044049455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:05,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:05,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:49:05,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365137539] [2023-11-29 02:49:05,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:05,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:49:05,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:49:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:49:05,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 104 [2023-11-29 02:49:05,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 61.833333333333336) internal successors, (371), 6 states have internal predecessors, (371), 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 02:49:05,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 104 [2023-11-29 02:49:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:06,032 INFO L124 PetriNetUnfolderBase]: 77/338 cut-off events. [2023-11-29 02:49:06,033 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:49:06,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 338 events. 77/338 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1628 event pairs, 55 based on Foata normal form. 1/267 useless extension candidates. Maximal degree in co-relation 502. Up to 143 conditions per place. [2023-11-29 02:49:06,036 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 49 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-11-29 02:49:06,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 318 flow [2023-11-29 02:49:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:49:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:49:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 302 transitions. [2023-11-29 02:49:06,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7259615384615384 [2023-11-29 02:49:06,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 302 transitions. [2023-11-29 02:49:06,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 302 transitions. [2023-11-29 02:49:06,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:06,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 302 transitions. [2023-11-29 02:49:06,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 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 02:49:06,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 02:49:06,047 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 02:49:06,047 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 196 flow. Second operand 4 states and 302 transitions. [2023-11-29 02:49:06,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 318 flow [2023-11-29 02:49:06,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:49:06,051 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 191 flow [2023-11-29 02:49:06,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2023-11-29 02:49:06,052 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -13 predicate places. [2023-11-29 02:49:06,052 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 191 flow [2023-11-29 02:49:06,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.833333333333336) internal successors, (371), 6 states have internal predecessors, (371), 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 02:49:06,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:06,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:49:06,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:49:06,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:06,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:06,054 INFO L85 PathProgramCache]: Analyzing trace with hash 492854478, now seen corresponding path program 1 times [2023-11-29 02:49:06,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:06,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680421856] [2023-11-29 02:49:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:06,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:06,242 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 02:49:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680421856] [2023-11-29 02:49:06,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680421856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:06,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:06,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:49:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768071945] [2023-11-29 02:49:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:49:06,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:49:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:49:06,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 104 [2023-11-29 02:49:06,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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 02:49:06,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:06,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 104 [2023-11-29 02:49:06,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:06,682 INFO L124 PetriNetUnfolderBase]: 68/322 cut-off events. [2023-11-29 02:49:06,682 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-29 02:49:06,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 322 events. 68/322 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1443 event pairs, 67 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 448. Up to 178 conditions per place. [2023-11-29 02:49:06,685 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 38 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2023-11-29 02:49:06,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 293 flow [2023-11-29 02:49:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:49:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:49:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2023-11-29 02:49:06,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2023-11-29 02:49:06,687 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 274 transitions. [2023-11-29 02:49:06,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 274 transitions. [2023-11-29 02:49:06,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:06,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 274 transitions. [2023-11-29 02:49:06,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 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 02:49:06,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 02:49:06,691 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 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 02:49:06,692 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 191 flow. Second operand 4 states and 274 transitions. [2023-11-29 02:49:06,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 293 flow [2023-11-29 02:49:06,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 94 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:49:06,695 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 237 flow [2023-11-29 02:49:06,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2023-11-29 02:49:06,697 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -9 predicate places. [2023-11-29 02:49:06,697 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 237 flow [2023-11-29 02:49:06,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 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 02:49:06,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:06,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:06,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:49:06,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:06,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:06,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1977986263, now seen corresponding path program 1 times [2023-11-29 02:49:06,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:06,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313860371] [2023-11-29 02:49:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:06,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:06,971 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 02:49:06,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:06,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313860371] [2023-11-29 02:49:06,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313860371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:06,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:06,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:49:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314922704] [2023-11-29 02:49:06,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:06,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:49:06,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:06,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:49:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:49:07,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 104 [2023-11-29 02:49:07,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 237 flow. Second operand has 7 states, 7 states have (on average 54.285714285714285) internal successors, (380), 7 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 02:49:07,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:07,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 104 [2023-11-29 02:49:07,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:07,578 INFO L124 PetriNetUnfolderBase]: 67/314 cut-off events. [2023-11-29 02:49:07,578 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-29 02:49:07,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 314 events. 67/314 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1384 event pairs, 66 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 519. Up to 167 conditions per place. [2023-11-29 02:49:07,581 INFO L140 encePairwiseOnDemand]: 88/104 looper letters, 30 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2023-11-29 02:49:07,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 88 transitions, 323 flow [2023-11-29 02:49:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:49:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 02:49:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 469 transitions. [2023-11-29 02:49:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637019230769231 [2023-11-29 02:49:07,584 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 469 transitions. [2023-11-29 02:49:07,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 469 transitions. [2023-11-29 02:49:07,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:07,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 469 transitions. [2023-11-29 02:49:07,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 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 02:49:07,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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 02:49:07,590 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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 02:49:07,590 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 237 flow. Second operand 8 states and 469 transitions. [2023-11-29 02:49:07,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 88 transitions, 323 flow [2023-11-29 02:49:07,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 88 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:49:07,594 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 261 flow [2023-11-29 02:49:07,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=261, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2023-11-29 02:49:07,595 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -7 predicate places. [2023-11-29 02:49:07,595 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 261 flow [2023-11-29 02:49:07,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.285714285714285) internal successors, (380), 7 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 02:49:07,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:07,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:07,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:49:07,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:07,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1977986262, now seen corresponding path program 1 times [2023-11-29 02:49:07,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:07,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580773619] [2023-11-29 02:49:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:07,962 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 02:49:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580773619] [2023-11-29 02:49:07,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580773619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:07,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:07,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:49:07,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605415434] [2023-11-29 02:49:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:07,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:49:07,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:07,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:49:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:49:08,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 104 [2023-11-29 02:49:08,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 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 02:49:08,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:08,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 104 [2023-11-29 02:49:08,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:08,545 INFO L124 PetriNetUnfolderBase]: 67/310 cut-off events. [2023-11-29 02:49:08,545 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-29 02:49:08,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 310 events. 67/310 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1403 event pairs, 66 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 508. Up to 171 conditions per place. [2023-11-29 02:49:08,548 INFO L140 encePairwiseOnDemand]: 94/104 looper letters, 30 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2023-11-29 02:49:08,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 86 transitions, 343 flow [2023-11-29 02:49:08,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:49:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:49:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 452 transitions. [2023-11-29 02:49:08,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208791208791209 [2023-11-29 02:49:08,550 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 452 transitions. [2023-11-29 02:49:08,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 452 transitions. [2023-11-29 02:49:08,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:08,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 452 transitions. [2023-11-29 02:49:08,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 64.57142857142857) internal successors, (452), 7 states have internal predecessors, (452), 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 02:49:08,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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 02:49:08,555 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 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 02:49:08,555 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 261 flow. Second operand 7 states and 452 transitions. [2023-11-29 02:49:08,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 86 transitions, 343 flow [2023-11-29 02:49:08,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 86 transitions, 309 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-29 02:49:08,559 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 249 flow [2023-11-29 02:49:08,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2023-11-29 02:49:08,560 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-11-29 02:49:08,560 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 249 flow [2023-11-29 02:49:08,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.166666666666664) internal successors, (361), 6 states have internal predecessors, (361), 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 02:49:08,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:08,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:49:08,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:08,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1825731198, now seen corresponding path program 1 times [2023-11-29 02:49:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:08,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698337822] [2023-11-29 02:49:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:08,655 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 02:49:08,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698337822] [2023-11-29 02:49:08,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698337822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:08,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:08,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:49:08,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333947457] [2023-11-29 02:49:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:49:08,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:49:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:49:08,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 104 [2023-11-29 02:49:08,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 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 02:49:08,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:08,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 104 [2023-11-29 02:49:08,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:08,982 INFO L124 PetriNetUnfolderBase]: 67/308 cut-off events. [2023-11-29 02:49:08,982 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-29 02:49:08,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 308 events. 67/308 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1386 event pairs, 66 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 503. Up to 171 conditions per place. [2023-11-29 02:49:08,985 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 31 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2023-11-29 02:49:08,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 85 transitions, 335 flow [2023-11-29 02:49:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:49:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:49:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 334 transitions. [2023-11-29 02:49:08,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423076923076924 [2023-11-29 02:49:08,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 334 transitions. [2023-11-29 02:49:08,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 334 transitions. [2023-11-29 02:49:08,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:08,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 334 transitions. [2023-11-29 02:49:08,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 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 02:49:08,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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 02:49:08,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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 02:49:08,991 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 249 flow. Second operand 5 states and 334 transitions. [2023-11-29 02:49:08,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 85 transitions, 335 flow [2023-11-29 02:49:08,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 85 transitions, 309 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 02:49:08,994 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 247 flow [2023-11-29 02:49:08,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2023-11-29 02:49:08,995 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -13 predicate places. [2023-11-29 02:49:08,996 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 247 flow [2023-11-29 02:49:08,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 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 02:49:08,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:08,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:08,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:49:08,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:08,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1825731199, now seen corresponding path program 1 times [2023-11-29 02:49:08,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:08,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135597572] [2023-11-29 02:49:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:08,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:09,174 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 02:49:09,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135597572] [2023-11-29 02:49:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135597572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:09,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:09,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:49:09,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878531488] [2023-11-29 02:49:09,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:09,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:49:09,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:09,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:49:09,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:49:09,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 104 [2023-11-29 02:49:09,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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 02:49:09,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:09,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 104 [2023-11-29 02:49:09,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:09,515 INFO L124 PetriNetUnfolderBase]: 67/306 cut-off events. [2023-11-29 02:49:09,515 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-29 02:49:09,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 306 events. 67/306 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1365 event pairs, 66 based on Foata normal form. 2/247 useless extension candidates. Maximal degree in co-relation 500. Up to 171 conditions per place. [2023-11-29 02:49:09,518 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 28 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2023-11-29 02:49:09,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 84 transitions, 327 flow [2023-11-29 02:49:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:49:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:49:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 346 transitions. [2023-11-29 02:49:09,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653846153846154 [2023-11-29 02:49:09,520 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 346 transitions. [2023-11-29 02:49:09,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 346 transitions. [2023-11-29 02:49:09,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:09,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 346 transitions. [2023-11-29 02:49:09,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 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 02:49:09,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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 02:49:09,524 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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 02:49:09,524 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 247 flow. Second operand 5 states and 346 transitions. [2023-11-29 02:49:09,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 84 transitions, 327 flow [2023-11-29 02:49:09,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 84 transitions, 301 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:49:09,527 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 245 flow [2023-11-29 02:49:09,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2023-11-29 02:49:09,528 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -14 predicate places. [2023-11-29 02:49:09,528 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 245 flow [2023-11-29 02:49:09,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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 02:49:09,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:09,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:09,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:49:09,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:09,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash 36831304, now seen corresponding path program 1 times [2023-11-29 02:49:09,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:09,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372972555] [2023-11-29 02:49:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:09,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:09,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372972555] [2023-11-29 02:49:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372972555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374151104] [2023-11-29 02:49:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:09,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:09,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:09,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:09,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:49:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:10,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 02:49:10,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:10,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:10,198 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 02:49:10,273 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 02:49:10,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-29 02:49:10,297 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 02:49:10,297 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 02:49:10,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:10,444 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 02:49:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:10,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:10,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:10,720 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 02:49:10,938 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:49:10,938 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 02:49:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:11,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374151104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:11,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:11,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2023-11-29 02:49:11,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030656859] [2023-11-29 02:49:11,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:11,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:49:11,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:11,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:49:11,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:49:13,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 104 [2023-11-29 02:49:13,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 245 flow. Second operand has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 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 02:49:13,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:13,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 104 [2023-11-29 02:49:13,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:14,465 INFO L124 PetriNetUnfolderBase]: 79/363 cut-off events. [2023-11-29 02:49:14,465 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-29 02:49:14,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 363 events. 79/363 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1676 event pairs, 76 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 554. Up to 193 conditions per place. [2023-11-29 02:49:14,468 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 47 selfloop transitions, 16 changer transitions 0/104 dead transitions. [2023-11-29 02:49:14,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 475 flow [2023-11-29 02:49:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:49:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 02:49:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 573 transitions. [2023-11-29 02:49:14,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121794871794872 [2023-11-29 02:49:14,471 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 573 transitions. [2023-11-29 02:49:14,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 573 transitions. [2023-11-29 02:49:14,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:14,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 573 transitions. [2023-11-29 02:49:14,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 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 02:49:14,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 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 02:49:14,483 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 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 02:49:14,483 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 245 flow. Second operand 9 states and 573 transitions. [2023-11-29 02:49:14,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 475 flow [2023-11-29 02:49:14,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 104 transitions, 413 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:49:14,488 INFO L231 Difference]: Finished difference. Result has 100 places, 92 transitions, 323 flow [2023-11-29 02:49:14,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=323, PETRI_PLACES=100, PETRI_TRANSITIONS=92} [2023-11-29 02:49:14,489 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -6 predicate places. [2023-11-29 02:49:14,489 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 92 transitions, 323 flow [2023-11-29 02:49:14,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 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 02:49:14,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:14,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 02:49:14,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:49:14,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:14,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:14,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1754320960, now seen corresponding path program 1 times [2023-11-29 02:49:14,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:14,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120441708] [2023-11-29 02:49:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120441708] [2023-11-29 02:49:14,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120441708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706250377] [2023-11-29 02:49:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:14,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:14,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:14,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:49:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:15,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:49:15,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:15,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:15,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706250377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:15,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:15,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 02:49:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696751758] [2023-11-29 02:49:15,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:15,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:49:15,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:49:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:49:15,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2023-11-29 02:49:15,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 92 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 75.125) internal successors, (601), 8 states have internal predecessors, (601), 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 02:49:15,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:15,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2023-11-29 02:49:15,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:15,409 INFO L124 PetriNetUnfolderBase]: 67/347 cut-off events. [2023-11-29 02:49:15,409 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-29 02:49:15,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 347 events. 67/347 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1309 event pairs, 66 based on Foata normal form. 4/291 useless extension candidates. Maximal degree in co-relation 573. Up to 166 conditions per place. [2023-11-29 02:49:15,411 INFO L140 encePairwiseOnDemand]: 100/104 looper letters, 62 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2023-11-29 02:49:15,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 559 flow [2023-11-29 02:49:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:49:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 02:49:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 641 transitions. [2023-11-29 02:49:15,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7704326923076923 [2023-11-29 02:49:15,415 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 641 transitions. [2023-11-29 02:49:15,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 641 transitions. [2023-11-29 02:49:15,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:15,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 641 transitions. [2023-11-29 02:49:15,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.125) internal successors, (641), 8 states have internal predecessors, (641), 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 02:49:15,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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 02:49:15,420 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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 02:49:15,421 INFO L175 Difference]: Start difference. First operand has 100 places, 92 transitions, 323 flow. Second operand 8 states and 641 transitions. [2023-11-29 02:49:15,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 559 flow [2023-11-29 02:49:15,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 114 transitions, 539 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 02:49:15,426 INFO L231 Difference]: Finished difference. Result has 108 places, 93 transitions, 339 flow [2023-11-29 02:49:15,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=108, PETRI_TRANSITIONS=93} [2023-11-29 02:49:15,427 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 2 predicate places. [2023-11-29 02:49:15,427 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 93 transitions, 339 flow [2023-11-29 02:49:15,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.125) internal successors, (601), 8 states have internal predecessors, (601), 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 02:49:15,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:15,427 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2023-11-29 02:49:15,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:49:15,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:15,628 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:15,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:15,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1348859978, now seen corresponding path program 2 times [2023-11-29 02:49:15,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:15,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364766833] [2023-11-29 02:49:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:15,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:17,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:17,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364766833] [2023-11-29 02:49:17,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364766833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:17,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516191042] [2023-11-29 02:49:17,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:49:17,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:17,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:17,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:17,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:49:17,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:49:17,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:17,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 02:49:17,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:17,957 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 02:49:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:18,020 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 02:49:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:18,126 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 02:49:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:18,191 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 02:49:18,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:18,325 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 02:49:18,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:18,375 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 02:49:18,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:18,474 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 02:49:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:18,523 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 02:49:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:18,599 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 02:49:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:18,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:18,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:18,873 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 02:49:19,012 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:49:19,013 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 02:49:19,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:19,403 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 02:49:19,565 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:49:19,565 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 02:49:19,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:19,950 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 02:49:20,091 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:49:20,091 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 02:49:20,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:49:20,513 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 02:49:20,723 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 02:49:20,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-29 02:49:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516191042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:21,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 35 [2023-11-29 02:49:21,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798166642] [2023-11-29 02:49:21,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:21,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:49:21,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:49:21,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:49:35,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 104 [2023-11-29 02:49:35,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 93 transitions, 339 flow. Second operand has 37 states, 37 states have (on average 64.5945945945946) internal successors, (2390), 37 states have internal predecessors, (2390), 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 02:49:35,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:35,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 104 [2023-11-29 02:49:35,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:37,951 INFO L124 PetriNetUnfolderBase]: 81/425 cut-off events. [2023-11-29 02:49:37,951 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2023-11-29 02:49:37,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 425 events. 81/425 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1735 event pairs, 76 based on Foata normal form. 6/367 useless extension candidates. Maximal degree in co-relation 807. Up to 195 conditions per place. [2023-11-29 02:49:37,953 INFO L140 encePairwiseOnDemand]: 96/104 looper letters, 87 selfloop transitions, 20 changer transitions 0/148 dead transitions. [2023-11-29 02:49:37,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 148 transitions, 887 flow [2023-11-29 02:49:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:49:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:49:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 918 transitions. [2023-11-29 02:49:37,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6789940828402367 [2023-11-29 02:49:37,958 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 918 transitions. [2023-11-29 02:49:37,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 918 transitions. [2023-11-29 02:49:37,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:37,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 918 transitions. [2023-11-29 02:49:37,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 70.61538461538461) internal successors, (918), 13 states have internal predecessors, (918), 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 02:49:37,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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 02:49:37,974 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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 02:49:37,975 INFO L175 Difference]: Start difference. First operand has 108 places, 93 transitions, 339 flow. Second operand 13 states and 918 transitions. [2023-11-29 02:49:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 148 transitions, 887 flow [2023-11-29 02:49:37,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 148 transitions, 871 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-29 02:49:37,981 INFO L231 Difference]: Finished difference. Result has 124 places, 102 transitions, 507 flow [2023-11-29 02:49:37,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=507, PETRI_PLACES=124, PETRI_TRANSITIONS=102} [2023-11-29 02:49:37,981 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2023-11-29 02:49:37,982 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 102 transitions, 507 flow [2023-11-29 02:49:37,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 64.5945945945946) internal successors, (2390), 37 states have internal predecessors, (2390), 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 02:49:37,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:37,983 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2023-11-29 02:49:37,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:49:38,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:38,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:38,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1578109144, now seen corresponding path program 2 times [2023-11-29 02:49:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:38,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301118194] [2023-11-29 02:49:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:38,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:38,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301118194] [2023-11-29 02:49:38,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301118194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:38,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156158317] [2023-11-29 02:49:38,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:49:38,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:38,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:38,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:38,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:49:39,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:49:39,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:39,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:49:39,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:39,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:39,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156158317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:39,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:39,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2023-11-29 02:49:39,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201297447] [2023-11-29 02:49:39,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:39,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:49:39,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:39,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:49:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:49:39,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2023-11-29 02:49:39,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 102 transitions, 507 flow. Second operand has 13 states, 13 states have (on average 76.84615384615384) internal successors, (999), 13 states have internal predecessors, (999), 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 02:49:39,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:39,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2023-11-29 02:49:39,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:39,497 INFO L124 PetriNetUnfolderBase]: 67/389 cut-off events. [2023-11-29 02:49:39,497 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-11-29 02:49:39,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 389 events. 67/389 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1326 event pairs, 66 based on Foata normal form. 4/333 useless extension candidates. Maximal degree in co-relation 744. Up to 166 conditions per place. [2023-11-29 02:49:39,499 INFO L140 encePairwiseOnDemand]: 100/104 looper letters, 87 selfloop transitions, 12 changer transitions 0/143 dead transitions. [2023-11-29 02:49:39,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 143 transitions, 883 flow [2023-11-29 02:49:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:49:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:49:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 953 transitions. [2023-11-29 02:49:39,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7636217948717948 [2023-11-29 02:49:39,502 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 953 transitions. [2023-11-29 02:49:39,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 953 transitions. [2023-11-29 02:49:39,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:39,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 953 transitions. [2023-11-29 02:49:39,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.41666666666667) internal successors, (953), 12 states have internal predecessors, (953), 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 02:49:39,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 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 02:49:39,506 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 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 02:49:39,506 INFO L175 Difference]: Start difference. First operand has 124 places, 102 transitions, 507 flow. Second operand 12 states and 953 transitions. [2023-11-29 02:49:39,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 143 transitions, 883 flow [2023-11-29 02:49:39,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 143 transitions, 859 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-29 02:49:39,512 INFO L231 Difference]: Finished difference. Result has 129 places, 99 transitions, 464 flow [2023-11-29 02:49:39,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=464, PETRI_PLACES=129, PETRI_TRANSITIONS=99} [2023-11-29 02:49:39,512 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 23 predicate places. [2023-11-29 02:49:39,512 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 99 transitions, 464 flow [2023-11-29 02:49:39,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.84615384615384) internal successors, (999), 13 states have internal predecessors, (999), 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 02:49:39,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:39,513 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2023-11-29 02:49:39,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:49:39,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:39,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:39,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash 131619090, now seen corresponding path program 3 times [2023-11-29 02:49:39,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:39,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032386489] [2023-11-29 02:49:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:40,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:40,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032386489] [2023-11-29 02:49:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032386489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:40,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:40,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 02:49:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853809170] [2023-11-29 02:49:40,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:40,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:49:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:49:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:49:40,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2023-11-29 02:49:40,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 99 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 76.61538461538461) internal successors, (996), 13 states have internal predecessors, (996), 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 02:49:40,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:40,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2023-11-29 02:49:40,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:40,762 INFO L124 PetriNetUnfolderBase]: 66/384 cut-off events. [2023-11-29 02:49:40,762 INFO L125 PetriNetUnfolderBase]: For 373/373 co-relation queries the response was YES. [2023-11-29 02:49:40,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 384 events. 66/384 cut-off events. For 373/373 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1308 event pairs, 66 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 734. Up to 165 conditions per place. [2023-11-29 02:49:40,764 INFO L140 encePairwiseOnDemand]: 100/104 looper letters, 85 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2023-11-29 02:49:40,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 140 transitions, 845 flow [2023-11-29 02:49:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:49:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:49:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1020 transitions. [2023-11-29 02:49:40,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7544378698224852 [2023-11-29 02:49:40,768 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1020 transitions. [2023-11-29 02:49:40,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1020 transitions. [2023-11-29 02:49:40,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:40,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1020 transitions. [2023-11-29 02:49:40,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 78.46153846153847) internal successors, (1020), 13 states have internal predecessors, (1020), 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 02:49:40,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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 02:49:40,776 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 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 02:49:40,776 INFO L175 Difference]: Start difference. First operand has 129 places, 99 transitions, 464 flow. Second operand 13 states and 1020 transitions. [2023-11-29 02:49:40,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 140 transitions, 845 flow [2023-11-29 02:49:40,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 140 transitions, 777 flow, removed 8 selfloop flow, removed 20 redundant places. [2023-11-29 02:49:40,782 INFO L231 Difference]: Finished difference. Result has 120 places, 96 transitions, 390 flow [2023-11-29 02:49:40,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=390, PETRI_PLACES=120, PETRI_TRANSITIONS=96} [2023-11-29 02:49:40,783 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 14 predicate places. [2023-11-29 02:49:40,783 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 96 transitions, 390 flow [2023-11-29 02:49:40,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.61538461538461) internal successors, (996), 13 states have internal predecessors, (996), 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 02:49:40,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:40,784 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-29 02:49:40,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 02:49:40,785 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:40,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash 131601936, now seen corresponding path program 3 times [2023-11-29 02:49:40,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:40,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300072496] [2023-11-29 02:49:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:40,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 336 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:42,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:42,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300072496] [2023-11-29 02:49:42,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300072496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:42,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923330379] [2023-11-29 02:49:42,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:49:42,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:42,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:42,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:42,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:49:42,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:49:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:42,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:49:42,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:42,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:42,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:42,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:42,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-29 02:49:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:49:42,903 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 02:49:42,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 02:49:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2023-11-29 02:49:42,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:49:42,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923330379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:42,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:49:42,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 16 [2023-11-29 02:49:42,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803275241] [2023-11-29 02:49:42,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:42,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:49:42,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:49:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:49:43,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2023-11-29 02:49:43,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 96 transitions, 390 flow. Second operand has 6 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 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 02:49:43,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:43,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2023-11-29 02:49:43,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:43,436 INFO L124 PetriNetUnfolderBase]: 73/422 cut-off events. [2023-11-29 02:49:43,436 INFO L125 PetriNetUnfolderBase]: For 284/284 co-relation queries the response was YES. [2023-11-29 02:49:43,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 422 events. 73/422 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1669 event pairs, 33 based on Foata normal form. 2/354 useless extension candidates. Maximal degree in co-relation 702. Up to 139 conditions per place. [2023-11-29 02:49:43,439 INFO L140 encePairwiseOnDemand]: 96/104 looper letters, 48 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2023-11-29 02:49:43,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 105 transitions, 541 flow [2023-11-29 02:49:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:49:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:49:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 428 transitions. [2023-11-29 02:49:43,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6858974358974359 [2023-11-29 02:49:43,441 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 428 transitions. [2023-11-29 02:49:43,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 428 transitions. [2023-11-29 02:49:43,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:43,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 428 transitions. [2023-11-29 02:49:43,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.33333333333333) internal successors, (428), 6 states have internal predecessors, (428), 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 02:49:43,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 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 02:49:43,446 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 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 02:49:43,446 INFO L175 Difference]: Start difference. First operand has 120 places, 96 transitions, 390 flow. Second operand 6 states and 428 transitions. [2023-11-29 02:49:43,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 105 transitions, 541 flow [2023-11-29 02:49:43,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 105 transitions, 506 flow, removed 2 selfloop flow, removed 13 redundant places. [2023-11-29 02:49:43,452 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 400 flow [2023-11-29 02:49:43,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2023-11-29 02:49:43,453 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 6 predicate places. [2023-11-29 02:49:43,453 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 400 flow [2023-11-29 02:49:43,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 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 02:49:43,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:43,453 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:43,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:49:43,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e922f73-7442-4bb0-94ec-6c046c8f8ca6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:43,654 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-29 02:49:43,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:43,655 INFO L85 PathProgramCache]: Analyzing trace with hash -215306693, now seen corresponding path program 1 times [2023-11-29 02:49:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:43,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40657025] [2023-11-29 02:49:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:43,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat