./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI --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 b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:41:39,369 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:41:39,445 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:41:39,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:41:39,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:41:39,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:41:39,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:41:39,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:41:39,481 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:41:39,482 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:41:39,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:41:39,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:41:39,484 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:41:39,485 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:41:39,485 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:41:39,486 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:41:39,486 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:41:39,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:41:39,487 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:41:39,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:41:39,488 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:41:39,491 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:41:39,492 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:41:39,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:41:39,493 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:41:39,493 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:41:39,494 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:41:39,494 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:41:39,494 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:41:39,495 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:41:39,495 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:41:39,496 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:41:39,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:39,496 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:41:39,497 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:41:39,497 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:41:39,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:41:39,497 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:41:39,497 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:41:39,498 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:41:39,498 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:41:39,498 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_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 [2023-11-24 21:41:39,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:41:39,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:41:39,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:41:39,816 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:41:39,817 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:41:39,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2023-11-24 21:41:43,059 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:41:43,518 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:41:43,519 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2023-11-24 21:41:43,545 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/data/5f8a5c095/38f0cfe330ee43d49913ab7d190e3484/FLAGf2961baf4 [2023-11-24 21:41:43,564 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/data/5f8a5c095/38f0cfe330ee43d49913ab7d190e3484 [2023-11-24 21:41:43,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:41:43,571 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:41:43,575 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:43,575 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:41:43,580 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:41:43,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:43" (1/1) ... [2023-11-24 21:41:43,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db9962d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:43, skipping insertion in model container [2023-11-24 21:41:43,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:43" (1/1) ... [2023-11-24 21:41:43,640 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:44,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:44,311 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:41:44,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:44,466 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:41:44,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44 WrapperNode [2023-11-24 21:41:44,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:44,468 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:44,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:41:44,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:41:44,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,501 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,532 INFO L138 Inliner]: procedures = 369, calls = 30, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2023-11-24 21:41:44,532 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:44,533 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:41:44,533 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:41:44,533 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:41:44,545 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,552 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,582 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [1, 5, 14, 1]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0, 0]. The 14 writes are split as follows [1, 2, 10, 1]. [2023-11-24 21:41:44,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,606 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,614 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:41:44,615 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:41:44,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:41:44,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:41:44,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (1/1) ... [2023-11-24 21:41:44,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:44,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:44,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:41:44,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:41:44,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:41:44,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:41:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:41:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:41:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:41:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:41:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:41:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:41:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:41:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:41:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:41:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:41:44,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:41:44,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:41:44,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:41:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:41:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:41:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:41:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:41:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:41:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:41:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:41:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-24 21:41:44,716 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-24 21:41:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:41:44,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:41:44,718 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:41:44,976 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:41:44,979 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:41:45,510 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:41:45,696 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:41:45,696 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:41:45,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:45 BoogieIcfgContainer [2023-11-24 21:41:45,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:41:45,700 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:41:45,700 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:41:45,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:41:45,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:41:43" (1/3) ... [2023-11-24 21:41:45,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1abfb003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:45, skipping insertion in model container [2023-11-24 21:41:45,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:44" (2/3) ... [2023-11-24 21:41:45,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1abfb003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:45, skipping insertion in model container [2023-11-24 21:41:45,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:45" (3/3) ... [2023-11-24 21:41:45,707 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_17-arrayloop_nr.i [2023-11-24 21:41:45,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:41:45,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-24 21:41:45,726 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:41:45,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:41:45,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 78 transitions, 160 flow [2023-11-24 21:41:45,875 INFO L124 PetriNetUnfolderBase]: 3/77 cut-off events. [2023-11-24 21:41:45,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:41:45,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 77 events. 3/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 239 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2023-11-24 21:41:45,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 78 transitions, 160 flow [2023-11-24 21:41:45,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 157 flow [2023-11-24 21:41:45,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:41:45,903 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;@308075eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:41:45,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-24 21:41:45,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:41:45,908 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:41:45,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:41:45,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:45,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:45,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:45,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash 380265, now seen corresponding path program 1 times [2023-11-24 21:41:45,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:45,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908025762] [2023-11-24 21:41:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:46,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:46,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908025762] [2023-11-24 21:41:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908025762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:46,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:46,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:46,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806267493] [2023-11-24 21:41:46,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:46,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:46,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:46,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 78 [2023-11-24 21:41:46,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2023-11-24 21:41:46,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:46,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 78 [2023-11-24 21:41:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:46,753 INFO L124 PetriNetUnfolderBase]: 142/538 cut-off events. [2023-11-24 21:41:46,754 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:41:46,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 538 events. 142/538 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3302 event pairs, 99 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 804. Up to 246 conditions per place. [2023-11-24 21:41:46,766 INFO L140 encePairwiseOnDemand]: 70/78 looper letters, 37 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-11-24 21:41:46,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 251 flow [2023-11-24 21:41:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2023-11-24 21:41:46,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2023-11-24 21:41:46,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 174 transitions. [2023-11-24 21:41:46,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 174 transitions. [2023-11-24 21:41:46,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:46,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 174 transitions. [2023-11-24 21:41:46,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:46,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-11-24 21:41:46,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-11-24 21:41:46,806 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 157 flow. Second operand 3 states and 174 transitions. [2023-11-24 21:41:46,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 251 flow [2023-11-24 21:41:46,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:46,821 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 156 flow [2023-11-24 21:41:46,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-11-24 21:41:46,827 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-11-24 21:41:46,827 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 156 flow [2023-11-24 21:41:46,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2023-11-24 21:41:46,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:46,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:41:46,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:46,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash 380266, now seen corresponding path program 1 times [2023-11-24 21:41:46,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:46,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138866405] [2023-11-24 21:41:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:47,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:47,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138866405] [2023-11-24 21:41:47,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138866405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:47,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:47,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:47,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428200201] [2023-11-24 21:41:47,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:47,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:47,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2023-11-24 21:41:47,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2023-11-24 21:41:47,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:47,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2023-11-24 21:41:47,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:47,270 INFO L124 PetriNetUnfolderBase]: 132/506 cut-off events. [2023-11-24 21:41:47,271 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:41:47,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 506 events. 132/506 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3044 event pairs, 99 based on Foata normal form. 22/398 useless extension candidates. Maximal degree in co-relation 774. Up to 246 conditions per place. [2023-11-24 21:41:47,279 INFO L140 encePairwiseOnDemand]: 70/78 looper letters, 35 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-11-24 21:41:47,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 79 transitions, 246 flow [2023-11-24 21:41:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-11-24 21:41:47,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7606837606837606 [2023-11-24 21:41:47,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-11-24 21:41:47,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-11-24 21:41:47,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:47,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-11-24 21:41:47,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2023-11-24 21:41:47,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-11-24 21:41:47,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-11-24 21:41:47,291 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 156 flow. Second operand 3 states and 178 transitions. [2023-11-24 21:41:47,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 79 transitions, 246 flow [2023-11-24 21:41:47,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:47,294 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 148 flow [2023-11-24 21:41:47,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-11-24 21:41:47,295 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -7 predicate places. [2023-11-24 21:41:47,296 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 148 flow [2023-11-24 21:41:47,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2023-11-24 21:41:47,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:47,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:41:47,297 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:47,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash 380306, now seen corresponding path program 1 times [2023-11-24 21:41:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:47,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939259341] [2023-11-24 21:41:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:47,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:47,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:47,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939259341] [2023-11-24 21:41:47,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939259341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:47,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:47,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:47,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307770206] [2023-11-24 21:41:47,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:47,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:47,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:47,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 78 [2023-11-24 21:41:47,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2023-11-24 21:41:47,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:47,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 78 [2023-11-24 21:41:47,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:47,614 INFO L124 PetriNetUnfolderBase]: 232/884 cut-off events. [2023-11-24 21:41:47,614 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-24 21:41:47,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 884 events. 232/884 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 5429 event pairs, 108 based on Foata normal form. 11/686 useless extension candidates. Maximal degree in co-relation 1366. Up to 267 conditions per place. [2023-11-24 21:41:47,623 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 48 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-11-24 21:41:47,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 306 flow [2023-11-24 21:41:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-24 21:41:47,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8589743589743589 [2023-11-24 21:41:47,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-24 21:41:47,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-24 21:41:47,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:47,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-24 21:41:47,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2023-11-24 21:41:47,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-11-24 21:41:47,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-11-24 21:41:47,629 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 148 flow. Second operand 3 states and 201 transitions. [2023-11-24 21:41:47,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 306 flow [2023-11-24 21:41:47,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:47,633 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 164 flow [2023-11-24 21:41:47,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2023-11-24 21:41:47,635 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -6 predicate places. [2023-11-24 21:41:47,635 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 164 flow [2023-11-24 21:41:47,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2023-11-24 21:41:47,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:47,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:41:47,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:41:47,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:47,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash 365445449, now seen corresponding path program 1 times [2023-11-24 21:41:47,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:47,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404770498] [2023-11-24 21:41:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:47,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:47,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404770498] [2023-11-24 21:41:47,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404770498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:47,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:47,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:47,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091244971] [2023-11-24 21:41:47,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:47,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:41:47,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:47,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:41:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:41:47,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 78 [2023-11-24 21:41:47,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 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) [2023-11-24 21:41:47,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:47,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 78 [2023-11-24 21:41:47,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:48,189 INFO L124 PetriNetUnfolderBase]: 273/892 cut-off events. [2023-11-24 21:41:48,190 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-24 21:41:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 892 events. 273/892 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5144 event pairs, 217 based on Foata normal form. 2/736 useless extension candidates. Maximal degree in co-relation 1469. Up to 511 conditions per place. [2023-11-24 21:41:48,198 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 43 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-11-24 21:41:48,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 268 flow [2023-11-24 21:41:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-11-24 21:41:48,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7393162393162394 [2023-11-24 21:41:48,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-11-24 21:41:48,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-11-24 21:41:48,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:48,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-11-24 21:41:48,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2023-11-24 21:41:48,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-11-24 21:41:48,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-11-24 21:41:48,204 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 164 flow. Second operand 3 states and 173 transitions. [2023-11-24 21:41:48,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 268 flow [2023-11-24 21:41:48,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:48,208 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 162 flow [2023-11-24 21:41:48,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-11-24 21:41:48,211 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -7 predicate places. [2023-11-24 21:41:48,211 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 162 flow [2023-11-24 21:41:48,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 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) [2023-11-24 21:41:48,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:48,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:41:48,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:41:48,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:48,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:48,213 INFO L85 PathProgramCache]: Analyzing trace with hash 365445450, now seen corresponding path program 1 times [2023-11-24 21:41:48,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:48,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77438537] [2023-11-24 21:41:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:48,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:48,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:48,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77438537] [2023-11-24 21:41:48,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77438537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:48,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:48,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:41:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115539280] [2023-11-24 21:41:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:48,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:41:48,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:41:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:41:48,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 78 [2023-11-24 21:41:48,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 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) [2023-11-24 21:41:48,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:48,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 78 [2023-11-24 21:41:48,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:49,025 INFO L124 PetriNetUnfolderBase]: 272/883 cut-off events. [2023-11-24 21:41:49,026 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-24 21:41:49,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 883 events. 272/883 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5124 event pairs, 234 based on Foata normal form. 1/710 useless extension candidates. Maximal degree in co-relation 1469. Up to 548 conditions per place. [2023-11-24 21:41:49,035 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 32 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-24 21:41:49,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 238 flow [2023-11-24 21:41:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:41:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:41:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2023-11-24 21:41:49,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6820512820512821 [2023-11-24 21:41:49,038 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 266 transitions. [2023-11-24 21:41:49,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 266 transitions. [2023-11-24 21:41:49,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:49,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 266 transitions. [2023-11-24 21:41:49,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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) [2023-11-24 21:41:49,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 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) [2023-11-24 21:41:49,042 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 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) [2023-11-24 21:41:49,043 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 162 flow. Second operand 5 states and 266 transitions. [2023-11-24 21:41:49,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 238 flow [2023-11-24 21:41:49,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:49,047 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 182 flow [2023-11-24 21:41:49,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-11-24 21:41:49,048 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2023-11-24 21:41:49,048 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 182 flow [2023-11-24 21:41:49,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 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) [2023-11-24 21:41:49,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:49,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:49,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:41:49,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:49,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:49,051 INFO L85 PathProgramCache]: Analyzing trace with hash -994228579, now seen corresponding path program 1 times [2023-11-24 21:41:49,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:49,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111492790] [2023-11-24 21:41:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:49,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:49,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111492790] [2023-11-24 21:41:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111492790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:41:49,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150173280] [2023-11-24 21:41:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:49,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:49,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:49,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:41:49,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:41:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:49,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:41:49,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:49,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:49,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150173280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:49,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:41:49,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-24 21:41:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48226311] [2023-11-24 21:41:49,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:49,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:41:49,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:41:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:41:49,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 78 [2023-11-24 21:41:49,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 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) [2023-11-24 21:41:49,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:49,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 78 [2023-11-24 21:41:49,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:49,943 INFO L124 PetriNetUnfolderBase]: 482/1658 cut-off events. [2023-11-24 21:41:49,943 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:41:49,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2738 conditions, 1658 events. 482/1658 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9622 event pairs, 88 based on Foata normal form. 33/1366 useless extension candidates. Maximal degree in co-relation 2712. Up to 234 conditions per place. [2023-11-24 21:41:49,958 INFO L140 encePairwiseOnDemand]: 70/78 looper letters, 102 selfloop transitions, 12 changer transitions 0/150 dead transitions. [2023-11-24 21:41:49,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 150 transitions, 588 flow [2023-11-24 21:41:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:41:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:41:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 408 transitions. [2023-11-24 21:41:49,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8717948717948718 [2023-11-24 21:41:49,961 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 408 transitions. [2023-11-24 21:41:49,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 408 transitions. [2023-11-24 21:41:49,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:49,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 408 transitions. [2023-11-24 21:41:49,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 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) [2023-11-24 21:41:49,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 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) [2023-11-24 21:41:49,967 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 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) [2023-11-24 21:41:49,967 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 182 flow. Second operand 6 states and 408 transitions. [2023-11-24 21:41:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 150 transitions, 588 flow [2023-11-24 21:41:49,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 150 transitions, 586 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:49,977 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 262 flow [2023-11-24 21:41:49,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2023-11-24 21:41:49,981 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2023-11-24 21:41:49,982 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 262 flow [2023-11-24 21:41:49,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 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) [2023-11-24 21:41:49,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:49,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2023-11-24 21:41:49,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:41:50,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:50,188 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:50,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:50,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1970953323, now seen corresponding path program 1 times [2023-11-24 21:41:50,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:50,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154219193] [2023-11-24 21:41:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:50,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:50,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154219193] [2023-11-24 21:41:50,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154219193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:41:50,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336510947] [2023-11-24 21:41:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:50,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:50,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:50,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:41:50,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:41:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:50,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 21:41:50,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:50,983 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:41:50,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-24 21:41:50,993 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 [2023-11-24 21:41:51,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:51,053 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 [2023-11-24 21:41:51,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:51,184 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 [2023-11-24 21:41:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:51,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:51,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:41:51,417 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 [2023-11-24 21:41:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:51,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336510947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:51,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:41:51,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-24 21:41:51,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18867545] [2023-11-24 21:41:51,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:51,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:41:51,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:41:51,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:41:54,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 78 [2023-11-24 21:41:54,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 262 flow. Second operand has 15 states, 15 states have (on average 42.4) internal successors, (636), 15 states have internal predecessors, (636), 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) [2023-11-24 21:41:54,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:54,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 78 [2023-11-24 21:41:54,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:55,410 INFO L124 PetriNetUnfolderBase]: 520/1707 cut-off events. [2023-11-24 21:41:55,410 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-11-24 21:41:55,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3043 conditions, 1707 events. 520/1707 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 9985 event pairs, 208 based on Foata normal form. 3/1345 useless extension candidates. Maximal degree in co-relation 3009. Up to 563 conditions per place. [2023-11-24 21:41:55,426 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 48 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2023-11-24 21:41:55,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 91 transitions, 428 flow [2023-11-24 21:41:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:41:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:41:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2023-11-24 21:41:55,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6517094017094017 [2023-11-24 21:41:55,429 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 305 transitions. [2023-11-24 21:41:55,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 305 transitions. [2023-11-24 21:41:55,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:55,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 305 transitions. [2023-11-24 21:41:55,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 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) [2023-11-24 21:41:55,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 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) [2023-11-24 21:41:55,432 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 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) [2023-11-24 21:41:55,433 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 262 flow. Second operand 6 states and 305 transitions. [2023-11-24 21:41:55,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 91 transitions, 428 flow [2023-11-24 21:41:55,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 91 transitions, 408 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:55,440 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 287 flow [2023-11-24 21:41:55,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2023-11-24 21:41:55,441 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2023-11-24 21:41:55,441 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 287 flow [2023-11-24 21:41:55,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 42.4) internal successors, (636), 15 states have internal predecessors, (636), 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) [2023-11-24 21:41:55,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:55,442 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1] [2023-11-24 21:41:55,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:41:55,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:55,654 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:55,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1823850686, now seen corresponding path program 2 times [2023-11-24 21:41:55,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:55,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79525482] [2023-11-24 21:41:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:55,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:55,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:55,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79525482] [2023-11-24 21:41:55,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79525482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:41:55,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964966488] [2023-11-24 21:41:55,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:41:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:55,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:41:55,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:41:56,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:41:56,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:41:56,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:41:56,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:56,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:56,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964966488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:56,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:41:56,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-24 21:41:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806444660] [2023-11-24 21:41:56,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:56,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:41:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:41:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:41:56,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 78 [2023-11-24 21:41:56,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 287 flow. Second operand has 13 states, 13 states have (on average 50.46153846153846) internal successors, (656), 13 states have internal predecessors, (656), 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) [2023-11-24 21:41:56,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:56,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 78 [2023-11-24 21:41:56,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:57,724 INFO L124 PetriNetUnfolderBase]: 1142/3808 cut-off events. [2023-11-24 21:41:57,724 INFO L125 PetriNetUnfolderBase]: For 838/838 co-relation queries the response was YES. [2023-11-24 21:41:57,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6989 conditions, 3808 events. 1142/3808 cut-off events. For 838/838 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 21851 event pairs, 88 based on Foata normal form. 66/3226 useless extension candidates. Maximal degree in co-relation 6923. Up to 234 conditions per place. [2023-11-24 21:41:57,755 INFO L140 encePairwiseOnDemand]: 70/78 looper letters, 234 selfloop transitions, 24 changer transitions 0/293 dead transitions. [2023-11-24 21:41:57,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 293 transitions, 1414 flow [2023-11-24 21:41:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:41:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:41:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 846 transitions. [2023-11-24 21:41:57,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2023-11-24 21:41:57,759 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 846 transitions. [2023-11-24 21:41:57,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 846 transitions. [2023-11-24 21:41:57,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:57,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 846 transitions. [2023-11-24 21:41:57,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 70.5) internal successors, (846), 12 states have internal predecessors, (846), 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) [2023-11-24 21:41:57,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 78.0) internal successors, (1014), 13 states have internal predecessors, (1014), 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) [2023-11-24 21:41:57,766 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 78.0) internal successors, (1014), 13 states have internal predecessors, (1014), 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) [2023-11-24 21:41:57,766 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 287 flow. Second operand 12 states and 846 transitions. [2023-11-24 21:41:57,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 293 transitions, 1414 flow [2023-11-24 21:41:57,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 293 transitions, 1390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:57,779 INFO L231 Difference]: Finished difference. Result has 106 places, 89 transitions, 486 flow [2023-11-24 21:41:57,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=486, PETRI_PLACES=106, PETRI_TRANSITIONS=89} [2023-11-24 21:41:57,782 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 28 predicate places. [2023-11-24 21:41:57,783 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 89 transitions, 486 flow [2023-11-24 21:41:57,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 50.46153846153846) internal successors, (656), 13 states have internal predecessors, (656), 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) [2023-11-24 21:41:57,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:57,785 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2023-11-24 21:41:57,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:41:57,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:57,995 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:41:57,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 373823862, now seen corresponding path program 2 times [2023-11-24 21:41:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:57,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728528623] [2023-11-24 21:41:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:57,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:59,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728528623] [2023-11-24 21:41:59,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728528623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:41:59,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308951693] [2023-11-24 21:41:59,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:41:59,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:59,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:59,464 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:41:59,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:41:59,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:41:59,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:41:59,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-24 21:41:59,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:59,729 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:41:59,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-24 21:41:59,743 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 [2023-11-24 21:41:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:59,810 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 [2023-11-24 21:41:59,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:59,924 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 [2023-11-24 21:42:00,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,033 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 [2023-11-24 21:42:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,138 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 [2023-11-24 21:42:00,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:42:00,256 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 [2023-11-24 21:42:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:00,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:42:00,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:42:00,474 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 [2023-11-24 21:42:00,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:42:00,775 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 49 treesize of output 67 [2023-11-24 21:42:01,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:42:01,183 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 55 treesize of output 73 [2023-11-24 21:42:01,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:42:01,586 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 61 treesize of output 79 [2023-11-24 21:42:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:42:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308951693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:42:02,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:42:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2023-11-24 21:42:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359562808] [2023-11-24 21:42:02,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:42:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-24 21:42:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:42:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-24 21:42:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 21:42:16,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2023-11-24 21:42:16,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 89 transitions, 486 flow. Second operand has 34 states, 34 states have (on average 38.411764705882355) internal successors, (1306), 34 states have internal predecessors, (1306), 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) [2023-11-24 21:42:16,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:42:16,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2023-11-24 21:42:16,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:42:20,360 INFO L124 PetriNetUnfolderBase]: 1240/4065 cut-off events. [2023-11-24 21:42:20,361 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2023-11-24 21:42:20,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 4065 events. 1240/4065 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 24267 event pairs, 478 based on Foata normal form. 6/3290 useless extension candidates. Maximal degree in co-relation 7553. Up to 1403 conditions per place. [2023-11-24 21:42:20,403 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 58 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2023-11-24 21:42:20,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 116 transitions, 770 flow [2023-11-24 21:42:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:42:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:42:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 560 transitions. [2023-11-24 21:42:20,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522682445759369 [2023-11-24 21:42:20,407 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 560 transitions. [2023-11-24 21:42:20,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 560 transitions. [2023-11-24 21:42:20,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:42:20,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 560 transitions. [2023-11-24 21:42:20,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 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) [2023-11-24 21:42:20,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 78.0) internal successors, (1092), 14 states have internal predecessors, (1092), 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) [2023-11-24 21:42:20,414 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 78.0) internal successors, (1092), 14 states have internal predecessors, (1092), 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) [2023-11-24 21:42:20,415 INFO L175 Difference]: Start difference. First operand has 106 places, 89 transitions, 486 flow. Second operand 13 states and 560 transitions. [2023-11-24 21:42:20,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 116 transitions, 770 flow [2023-11-24 21:42:20,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 116 transitions, 758 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:42:20,425 INFO L231 Difference]: Finished difference. Result has 123 places, 92 transitions, 591 flow [2023-11-24 21:42:20,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=591, PETRI_PLACES=123, PETRI_TRANSITIONS=92} [2023-11-24 21:42:20,427 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 45 predicate places. [2023-11-24 21:42:20,428 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 92 transitions, 591 flow [2023-11-24 21:42:20,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 38.411764705882355) internal successors, (1306), 34 states have internal predecessors, (1306), 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) [2023-11-24 21:42:20,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:42:20,429 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1] [2023-11-24 21:42:20,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:42:20,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 21:42:20,636 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 21:42:20,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:42:20,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1603238016, now seen corresponding path program 3 times [2023-11-24 21:42:20,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:42:20,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687359745] [2023-11-24 21:42:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:42:20,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:42:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:42:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-11-24 21:42:22,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:42:22,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687359745] [2023-11-24 21:42:22,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687359745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:42:22,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94277209] [2023-11-24 21:42:22,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:42:22,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:42:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:42:22,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:42:22,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4343e0eb-2478-4bed-8e59-974b44fda9c5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process